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Simpson Racing|3 in stockRegular price $899.95Unit price / per
$1,012.95Sale price $899.95 Regular price -
Simpson RacingRegular price $719.95Unit price / per
$809.95Sale price $719.95 Regular price -
Simpson Racing|14 in stockRegular price $119.95Unit price / per
$134.95Sale price $119.95 Regular price -
Simpson Racing|10 in stockRegular price $109.95Unit price / per
$123.95Sale price $109.95 Regular price -
Simpson RacingRegular price $769.95Unit price / per
$866.95Sale price $769.95 Regular price -
Simpson Racing|4 in stockRegular price $409.95Unit price / per
$461.95Sale price $409.95 Regular price -
Simpson Racing|25 in stockRegular price $669.95Unit price / per
$753.95Sale price $669.95 Regular price -
Simpson RacingRegular price $669.95Unit price / per
$753.95Sale price $669.95 Regular price -
Holley EFI|4 in stockRegular price $1,849.95Unit price / per
$2,081.95Sale price $1,849.95 Regular price -
Off-Road Use Only!{ "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 -
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": 6, "variants": [{ "id": "43597407092829", "title": "Single Calibration \/ Delete Pipe", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] }, { "id": "43597407125597", "title": "Single Calibration \/ 4-inch Exhaust", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] }, { "id": "43597407158365", "title": "Single Calibration \/ 5-inch Exhaust", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] }, { "id": "43597407191133", "title": "Switch On The Fly (SOTF) Calibration \/ Delete Pipe", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] }, { "id": "43597407223901", "title": "Switch On The Fly (SOTF) Calibration \/ 4-inch Exhaust", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] }, { "id": "43597407256669", "title": "Switch On The Fly (SOTF) Calibration \/ 5-inch Exhaust", "fitmentClass": "", "applicationCount": 2, "applications": [{ "verified": true, "make": "Ford", "model": "F250", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." }, { "verified": true, "make": "Ford", "model": "F350", "engine": "6.7L", "type": "Powerstroke", "years": ["2023","2024","2025"], "body": "Pickup", "notes": "F250\/F350 pickup only. Tune before hardware removal." } ] } ] }SaleJS Speed Diesel|30 in stockRegular price $2,878.07Unit price / per$3,462.12Sale price $2,878.07 Regular price -
Simpson RacingRegular price $0.00Unit price / per
$0.00Sale price $0.00 Regular price -
Simpson Racing|407 in stockRegular price $109.95Unit price / per
$123.95Sale price $109.95 Regular price -
Simpson RacingRegular price $384.95Unit price / per
$1,012.95Sale price $384.95 Regular price -
Simpson RacingRegular price $124.95Unit price / per
$359.95Sale price $124.95 Regular price -
Simpson RacingRegular price $1,359.95Unit price / per
$1,529.95Sale price $1,359.95 Regular price -
Simpson Racing|1 in stockRegular price $879.95Unit price / per
$989.95Sale price $879.95 Regular price -
Simpson RacingRegular price $1,609.95Unit price / per
$1,811.95Sale price $1,609.95 Regular price -
Simpson Racing|13 in stockRegular price $159.95Unit price / per
$179.95Sale price $159.95 Regular price -
Simpson Racing|1 in stockRegular price $159.95Unit price / per
$179.95Sale price $159.95 Regular price -
Simpson RacingRegular price $119.95Unit price / per
$134.95Sale price $119.95 Regular price -
Simpson Racing|35 in stockRegular price $139.95Unit price / per
$157.95Sale price $139.95 Regular price -
Simpson Racing|2 in stockRegular price $219.95Unit price / per
$247.95Sale price $219.95 Regular price
