-
Holley EFI|1 in stockRegular price $3,499.95Unit price / per
$3,937.95Sale price $3,499.95 Regular price -
Holley EFI|1 in stockRegular price $3,799.95Unit price / per
$4,274.95Sale price $3,799.95 Regular price -
Holley EFIRegular price $4,149.95Unit price / per
$4,668.95Sale price $4,149.95 Regular price -
Holley EFI|100 in stockRegular price $299.95Unit price / per
$337.95Sale price $299.95 Regular price -
Holley EFI|100 in stockRegular price $104.95Unit price / per
$218.95Sale price $104.95 Regular price -
Off-Road Use Only!{ "variantCount": 1, "variants": [{ "id": "43268979556445", "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": "LM2 only; retains the original muffler." }, { "verified": true, "make": "GM", "model": "Sierra 1500", "engine": "3.0L", "type": "Duramax LM2", "years": ["2020","2021","2022"], "body": "Pickup", "notes": "LM2 only; retains the original muffler." } ] } ] }JS Speed Diesel|5 in stockRegular price $350.00Unit price / per -
New{ "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 -
Off-Road Use Only!{ "variantCount": 1, "variants": [{ "id": "43268977688669", "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 send-in unlock service." }, { "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 send-in unlock service." } ] } ] }JS Speed Diesel|5 in stockRegular price $550.00Unit price / per -
Off-Road Use Only!{ "variantCount": 8, "variants": [{ "id": "43678316986461", "title": "Yes add an OBD2 + credits \/ Stock Optimized (+0HP)", "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." } ] }, { "id": "43678317150301", "title": "Yes add an OBD2 + credits \/ All Tune Levels", "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." } ] }, { "id": "43678317183069", "title": "No do not add an OBD2 \/ Stock Optimized (+0HP)", "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." } ] }, { "id": "43678317346909", "title": "No do not add an OBD2 \/ All Tune Levels", "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." } ] }, { "id": "67703721132125", "title": "Yes add an OBD2 + credits \/ Tow (+20HP)", "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." } ] }, { "id": "67703721164893", "title": "Yes add an OBD2 + credits \/ Street (+40HP)", "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." } ] }, { "id": "67703721197661", "title": "No do not add an OBD2 \/ Tow (+20HP)", "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." } ] }, { "id": "67703721230429", "title": "No do not add an OBD2 \/ Street (+40HP)", "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." } ] } ] }JS Speed Tunes|40 in stockRegular price $1,713.48Unit price / per -
Off-Road Use Only!{ "variantCount": 4, "variants": [{ "id": "43589457346653", "title": "Stock Optimized (+0HP)", "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." } ] }, { "id": "43589457477725", "title": "All Tune Levels", "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." } ] }, { "id": "67703719198813", "title": "Tow (+20HP)", "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." } ] }, { "id": "67703719231581", "title": "Street (+40HP)", "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|20 in stockRegular price $2,896.06Unit price / per$3,214.63Sale price $2,896.06 Regular price -
Off-Road Use Only!{ "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 -
New{ "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 $2,895.11Unit price / per -
{ "variantCount": 6, "variants": [{ "id": "44214428139613", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "44214428172381", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "44214428205149", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "44214428237917", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "44214428270685", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "44214428303453", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] } ] }JS Speed Tunes|30 in stockRegular price $1,499.99Unit price / per -
New{ "variantCount": 6, "variants": [{ "id": "67699217399901", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217432669", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217465437", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217498205", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217530973", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] }, { "id": "67699217563741", "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"], "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"], "body": "Pickup", "notes": "LZ0 engine only; LM2 excluded. ECM unlock required before tuning." } ] } ] }JS Speed Diesel|30 in stockRegular price $1,873.48Unit price / per -
Off-Road Use Only!{ "variantCount": 8, "variants": [{ "id": "43268986765405", "title": "Economy \/ 2014-2017", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Jeep", "model": "Grand Cherokee", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017"], "body": "SUV", "notes": "Resolve existing DEF\/DPF\/SCR faults before tuning. Select the calibration for the installed emissions configuration." } ] }, { "id": "43268986798173", "title": "Economy \/ 2018-2019", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986830941", "title": "Stock Plus \/ 2014-2017", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986863709", "title": "Stock Plus \/ 2018-2019", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986896477", "title": "Race \/ 2014-2017", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986929245", "title": "Race \/ 2018-2019", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986962013", "title": "Max \/ 2014-2017", "fitmentClass": "", "applicationCount": 0, "applications": [] }, { "id": "43268986994781", "title": "Max \/ 2018-2019", "fitmentClass": "", "applicationCount": 0, "applications": [] } ] }JS Speed Diesel|3030 in stockRegular price $880.00Unit price / per -
JS Speed DieselRegular price $880.00Unit price / per
-
Off-Road Use Only!{ "variantCount": 2, "variants": [{ "id": "43788131565661", "title": "Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Jeep", "model": "Grand Cherokee", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017","2018"], "body": "SUV", "notes": "WK2 with the 3.0L EcoDiesel engine." } ] }, { "id": "44214968090717", "title": "Aluminized Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Jeep", "model": "Grand Cherokee", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017","2018"], "body": "SUV", "notes": "WK2 with the 3.0L EcoDiesel engine." } ] } ] }JS Speed Diesel|10 in stockRegular price $379.00Unit price / per -
Off-Road Use Only!{ "variantCount": 2, "variants": [{ "id": "43268987650141", "title": "409 Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Ram", "model": "1500", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017","2018","2019"], "body": "Pickup", "notes": "Extended or Crew Cab only; Regular Cab excluded. A 5 ft 7 in bed requires 7 in trimmed from the connector near the secondary pipe." } ] }, { "id": "43400074166365", "title": "304 Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Ram", "model": "1500", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017","2018","2019"], "body": "Pickup", "notes": "Extended or Crew Cab only; Regular Cab excluded. A 5 ft 7 in bed requires 7 in trimmed from the connector near the secondary pipe." } ] } ] }JS Speed Diesel|10 in stockRegular price $313.50Unit price / per -
{ "variantCount": 2, "variants": [{ "id": "43788131336285", "title": "T409 Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Ram", "model": "1500", "engine": "3.0L", "type": "EcoDiesel", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "Third-generation EcoDiesel. Extended or Crew Cab only; Regular Cab excluded. A 5 ft 7 in bed requires 7 in trimmed from the connector near the secondary pipe." } ] }, { "id": "44214944727133", "title": "T304 Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Ram", "model": "1500", "engine": "3.0L", "type": "EcoDiesel", "years": ["2020","2021","2022","2023"], "body": "Pickup", "notes": "Third-generation EcoDiesel. Extended or Crew Cab only; Regular Cab excluded. A 5 ft 7 in bed requires 7 in trimmed from the connector near the secondary pipe." } ] } ] }JS Speed Diesel|10 in stockRegular price $299.00Unit price / per -
Off-Road Use Only!{ "variantCount": 2, "variants": [{ "id": "43788131369053", "title": "Stainless Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Jeep", "model": "Grand Cherokee", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017"], "body": "SUV", "notes": "Tune and resolve existing DEF\/DPF\/SCR faults before changing hardware." } ] }, { "id": "43788131401821", "title": "Aluminized Steel", "fitmentClass": "", "applicationCount": 1, "applications": [{ "verified": true, "make": "Jeep", "model": "Grand Cherokee", "engine": "3.0L", "type": "EcoDiesel", "years": ["2014","2015","2016","2017"], "body": "SUV", "notes": "Tune and resolve existing DEF\/DPF\/SCR faults before changing hardware." } ] } ] }SaleJS Speed Diesel|10 in stockRegular price $1,602.08Unit price / per$1,847.89Sale price $1,602.08 Regular price
