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{ "variantCount": 1, "variants": [{ "id": "67699216515165", "title": "Default Title", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LM2", "years": ["2020","2021","2022"], "body": "Pickup", "notes": "E46 ECM only; E66\/Global B trucks excluded. ECM must be unlocked before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LM2", "years": ["2020","2021","2022"], "body": "Pickup", "notes": "E46 ECM only; E66\/Global B trucks excluded. ECM must be unlocked before tuning." } ] } ] }SaleJS Speed Diesel|5 in stockRegular price $2,534.99Unit price / per
$2,896.06Sale price $2,534.99 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43268975362141", "title": "Default Title", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LM2", "years": ["2020","2021","2022"], "body": "Pickup", "notes": "Custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LM2", "years": ["2020","2021","2022"], "body": "Pickup", "notes": "Custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "Custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "Custom tuning required." } ] } ] }JS Speed Diesel|5 in stockRegular price $275.00Unit price / per
Sale price $275.00 Regular price -
{ "variantCount": 6, "variants": [{ "id": "67699217596509", "title": "Stock Optimized (0HP) \/ Yes", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217629277", "title": "Stock Optimized (0HP) \/ No", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217662045", "title": "Tow (+20HP) \/ Yes", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217694813", "title": "Tow (+20HP) \/ No", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217727581", "title": "Street (+40HP) \/ Yes", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217760349", "title": "Street (+40HP) \/ No", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LZ0", "years": ["2023","2024","2025","2026"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] } ] }JS Speed Diesel|30 in stockRegular price $3,047.11Unit price / per
Sale price $3,047.11 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43549850959965", "title": "Stainless steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "LBZ engine only. Fits late 2006 to early 2007. Excludes LMM engines and Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "LBZ engine only. Fits late 2006 to early 2007. Excludes LMM engines and Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "LBZ engine only. Fits late 2006 to early 2007. Excludes LMM engines and Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "LBZ engine only. Fits late 2006 to early 2007. Excludes LMM engines and Cab \u0026 Chassis." } ] } ] }SaleJS Speed Diesel|5 in stockRegular price $399.99Unit price / per
$495.00Sale price $399.99 Regular price -
{ "variantCount": 12, "variants": [{ "id": "44214964191325", "title": "2017-2018 \/ Delete Pipe", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "44214964224093", "title": "2017-2018 \/ 4-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "44214964256861", "title": "2017-2018 \/ 5-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "44214964289629", "title": "2020 - 2023 \/ Delete Pipe", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "44214964322397", "title": "2020 - 2023 \/ 4-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "44214964355165", "title": "2020 - 2023 \/ 5-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "43788131434589", "title": "2024-2025 \/ Delete Pipe", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "43788131467357", "title": "2024-2025 \/ 4-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "43788131500125", "title": "2024-2025 \/ 5-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2024","2025"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "67701783822429", "title": "2019 \/ Delete Pipe", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "67701783855197", "title": "2019 \/ 4-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] }, { "id": "67701783887965", "title": "2019 \/ 5-inch Downpipe-Back Exhaust", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2019"], "body": "Pickup", "notes": "HD pickup only. 2024+ E42 ECM requires a separate HP Tuners unlock service. Select the exact year and ECM package; tune before hardware removal." } ] } ] }SaleJS Speed Diesel|60 in stockRegular price $2,811.99Unit price / per
$3,417.10Sale price $2,811.99 Regular price -
{ "variantCount": 2, "variants": [{ "id": "43268996563037", "title": "2017-2019", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." } ] }, { "id": "43268996595805", "title": "2020-2023", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." } ] } ] }SaleJS Speed Diesel|568 in stockRegular price $363.00Unit price / per
$440.00Sale price $363.00 Regular price -
{ "variantCount": 2, "variants": [{ "id": "43678320984157", "title": "2017-2019", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2017","2018","2019"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." } ] }, { "id": "43678321016925", "title": "2020-2025", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023","2024","2025"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023","2024","2025"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023","2024","2025"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax L5P", "years": ["2020","2021","2022","2023","2024","2025"], "body": "Pickup", "notes": "L5P HD pickup application. Select the correct generation; custom tuning required." } ] } ] }SaleJS Speed Diesel|10 in stockRegular price $299.00Unit price / per
$440.00Sale price $299.00 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43268979589213", "title": "Default Title", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "Late-2006 to early-2007 LBZ only. Confirm production date and engine code; LMM excluded." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "Late-2006 to early-2007 LBZ only. Confirm production date and engine code; LMM excluded." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "Late-2006 to early-2007 LBZ only. Confirm production date and engine code; LMM excluded." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LBZ", "years": ["2006","2007"], "body": "Pickup", "notes": "Late-2006 to early-2007 LBZ only. Confirm production date and engine code; LMM excluded." } ] } ] }JS Speed Diesel|8 in stockRegular price $142.99Unit price / per
Sale price $142.99 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43268995416157", "title": "Default Title", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014"], "body": "Pickup", "notes": "LML HD pickup application; custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014"], "body": "Pickup", "notes": "LML HD pickup application; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014"], "body": "Pickup", "notes": "LML HD pickup application; custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014"], "body": "Pickup", "notes": "LML HD pickup application; custom tuning required." } ] } ] }JS Speed Diesel|5 in stockRegular price $137.50Unit price / per
Sale price $137.50 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43268995842141", "title": "Default Title", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015","2016"], "body": "Pickup", "notes": "HD pickup only; Cab \u0026 Chassis excluded. Custom tuning required." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015","2016"], "body": "Pickup", "notes": "HD pickup only; Cab \u0026 Chassis excluded. Custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015","2016"], "body": "Pickup", "notes": "HD pickup only; Cab \u0026 Chassis excluded. Custom tuning required." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015","2016"], "body": "Pickup", "notes": "HD pickup only; Cab \u0026 Chassis excluded. Custom tuning required." } ] } ] }JS Speed Diesel|5 in stockRegular price $209.00Unit price / per
Sale price $209.00 Regular price -
{ "variantCount": 8, "variants": [{ "id": "43268976443485", "title": "2011-2015 \/ Delete Pipe \/ 304 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "43268976476253", "title": "2011-2015 \/ Delete Pipe \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "43268976509021", "title": "2015.5-2016 \/ Delete Pipe \/ 304 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "43268976541789", "title": "2015.5-2016 \/ Delete Pipe \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2015.5","2016"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "67701763571805", "title": "2011-2015 \/ 4\" Downpipe-Back Race Exhaust \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "67701763604573", "title": "2011-2015 \/ 5\" Downpipe-Back Race Exhaust \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LML", "years": ["2011","2012","2013","2014","2015"], "body": "Pickup", "notes": "HD pickup only. Visually verify V-band (2011-early 2015) versus three-bolt flange (2015.5-2016) before ordering; tune before hardware removal." } ] }, { "id": "67701763637341", "title": "2015.5-2016 \/ 4\" Downpipe-Back Race Exhaust \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "67701763670109", "title": "2015.5-2016 \/ 5\" Downpipe-Back Race Exhaust \/ 409 Stainless Steel", "fitmentClass": "", "applicationCount": 0, "applications": [] } ] }SaleJS Speed Diesel|40 in stockRegular price $1,596.00Unit price / per
$1,632.37Sale price $1,596.00 Regular price -
{ "variantCount": 1, "variants": [{ "id": "43268981620829", "title": "Default Title", "fitmentClass": "", "applicationCount": 4, "applications": [{ "verified": true, "make": "GM", "model": "Silverado 2500", "engine": "6.6L", "type": "Duramax LMM", "years": ["2007.5","2008","2009","2010"], "body": "Pickup", "notes": "LMM pickup only; excludes Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Silverado 3500", "engine": "6.6L", "type": "Duramax LMM", "years": ["2007.5","2008","2009","2010"], "body": "Pickup", "notes": "LMM pickup only; excludes Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Sierra 2500", "engine": "6.6L", "type": "Duramax LMM", "years": ["2007.5","2008","2009","2010"], "body": "Pickup", "notes": "LMM pickup only; excludes Cab \u0026 Chassis." }, { "verified": true, "make": "GM", "model": "Sierra 3500", "engine": "6.6L", "type": "Duramax LMM", "years": ["2007.5","2008","2009","2010"], "body": "Pickup", "notes": "LMM pickup only; excludes Cab \u0026 Chassis." } ] } ] }JS Speed Diesel|5 in stockRegular price $149.99Unit price / per
Sale price $149.99 Regular price


