2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Engine & Performance

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Crate Engines

Crate Engines

2001-2004 GM 2500HD/3500HD 6.6L LBZ Duramax Gaskets, Gasket Kits & Bearings

Gaskets

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Glow Plugs

Glow Plugs

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Head Studs & Main Studs

Head Studs & Main Studs

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Heads & Valve Train

Heads & Valve Train

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Motor Mounts

Motor Mounts

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Oil Pans

Oil Pans

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Rods, Pistons, Cams, & More

Rods/Pistons/Cams & More

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Fleece FPE-DMAX-OC-BLU Oil Cap Blue | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
Fleece FPE-DMAX-OC-BLU Oil Cap Blue | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-OC-BLU Oil Cap Blue | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-DMAX-OC-BLU Oil Cap Blue | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-DMAX-OC-BLU
$39.99
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100442
$51.41
Edge 21500-3 Juice with Attitude CTS3 | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
IN STOCK
Edge 21500-3 Juice with Attitude CTS3 | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Edge 21500-3 Juice with Attitude CTS3 | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Edge Products

Edge 21500-3 Juice with Attitude CTS3 | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: EDG21500-3
$1,449.95
$1,631.95
SAVE $182
BD Diesel 1057735 Throttle Sensitivity Booster | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
BD Diesel 1057735 Throttle Sensitivity Booster | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1057735 Throttle Sensitivity Booster | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1057735
$289.95
$306
SAVE $16.05
SoCal Diesel 917371 Super Damper Diesel Harmonic Balancers | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
SoCal Diesel 917371 Super Damper Diesel Harmonic Balancers | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
SoCal Diesel 917371 Super Damper Diesel Harmonic Balancers | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SoCal Diesel

SoCal Diesel 917371 Super Damper Diesel Harmonic Balancers | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: SLD917371
$464.31
ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP900-0750
$97.13
ARP 100-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 100-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 100-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP100-7534
$105.53
$201.29
SAVE $95.76
Merchant 10001 Transfer Case Pump Upgrade Kit | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10001 Transfer Case Pump Upgrade Kit | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10001 Transfer Case Pump Upgrade Kit | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10001
$77.63
PPE 114001000 Internal Oil Cooler Removal Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 114001000 Internal Oil Cooler Removal Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114001000 Internal Oil Cooler Removal Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114001000
$269.99
Fluidampr 890101 External Balance Steel Black Zinc Finish O.D. 8-3/8 inch Performance Damper | 01-05 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fluidampr 890101 External Balance Steel Black Zinc Finish O.D. 8-3/8 inch Performance Damper | 01-05 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fluidampr

Fluidampr 890101 External Balance Steel Black Zinc Finish O.D. 8-3/8 inch Performance Damper | 01-05 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLU890101
$574.82
PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications
PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications
PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications
PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications
PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications

PPE

PPE 114002100 Oil Filter Mount Aluminum Billet | PPE/GM Filter Applications

SKU: PPE114002100
$143.99
$159.99
SAVE $16
PPE 119000300 304 Stainless Steel Coolant Reroute Tube OEM Bend (Raw) | 2004.5-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 119000300 304 Stainless Steel Coolant Reroute Tube OEM Bend (Raw) | 2004.5-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 119000300 304 Stainless Steel Coolant Reroute Tube OEM Bend (Raw) | 2004.5-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 119000300 304 Stainless Steel Coolant Reroute Tube OEM Bend (Raw) | 2004.5-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

PPE

PPE 119000300 304 Stainless Steel Coolant Reroute Tube OEM Bend (Raw) | 2004.5-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: PPE119000300
$53.99
$59.99
SAVE $6
PPE 116002046 Turbo Coolant Hose Straight - Small Diameter 10mm ID | 2004-2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 116002046 Turbo Coolant Hose Straight - Small Diameter 10mm ID | 2004-2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 116002046 Turbo Coolant Hose Straight - Small Diameter 10mm ID | 2004-2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 116002046 Turbo Coolant Hose Straight - Small Diameter 10mm ID | 2004-2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

PPE

PPE 116002046 Turbo Coolant Hose Straight - Small Diameter 10mm ID | 2004-2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: PPE116002046
$6.29
Merchant Automotive 10345 Water Pump Gasket Kit | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Merchant Automotive 10345 Water Pump Gasket Kit | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant Automotive 10345 Water Pump Gasket Kit | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: MAT10345
$41.72
Fluidampr 300010 Harmonic Balancer Bolt Kit | 2001-2018 GM/Chevy Silverado 2500HD/3500HD 6.6L Duramax
Fluidampr 300010 Harmonic Balancer Bolt Kit | 2001-2018 GM/Chevy Silverado 2500HD/3500HD 6.6L Duramax

Fluidampr

Fluidampr 300010 Harmonic Balancer Bolt Kit | 2001-2018 GM/Chevy Silverado 2500HD/3500HD 6.6L Duramax

SKU: FLU300010
$88.43
$104.04
SAVE $15.61
ARP 130-7403 12pt (Street) Thermostat Housing Bolt Kit | 2001-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LBZ
ARP 130-7403 12pt (Street) Thermostat Housing Bolt Kit | 2001-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LBZ

ARP

ARP 130-7403 12pt (Street) Thermostat Housing Bolt Kit | 2001-2007 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LBZ

SKU: ARP130-7403
$17.41
PPE 118021455 Valve Cover Kit w/o Accessory Mounting | 2004-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 118021455 Valve Cover Kit w/o Accessory Mounting | 2004-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 118021455 Valve Cover Kit w/o Accessory Mounting | 2004-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
PPE 118021455 Valve Cover Kit w/o Accessory Mounting | 2004-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021455 Valve Cover Kit w/o Accessory Mounting | 2004-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: PPE118021455
$287.99
$319.99
SAVE $32
Tuner DT1110010101009 Switch on the Fly Tune incl EFI Live Spade | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Tuner DT1110010101009 Switch on the Fly Tune incl EFI Live Spade | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Duramax Tuner

Tuner DT1110010101009 Switch on the Fly Tune incl EFI Live Spade | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: DMTDT1110010101009
$1,140
Wagler C6658 Street Girdle | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6658 Street Girdle | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6658 Street Girdle | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6658
$850
PPE 119024100 Upper & Lower Coolant Hose Kit - Yellow | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 119024100 Upper & Lower Coolant Hose Kit - Yellow | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119024100 Upper & Lower Coolant Hose Kit - Yellow | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119024100
$269.99
PPE 119021004 EGR to CAB Coolant Hose | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
IN STOCK
PPE 119021004 EGR to CAB Coolant Hose | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

PPE

PPE 119021004 EGR to CAB Coolant Hose | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: PPE119021004
$10.79
PPE 114010000 Oil Centrifuge Filtration Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 114010000 Oil Centrifuge Filtration Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114010000 Oil Centrifuge Filtration Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114010000
$449.99
Mishimoto MMCFK-F2D-03BL Blue Coolant Filter Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke
IN STOCK
Mishimoto MMCFK-F2D-03BL Blue Coolant Filter Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke
Mishimoto MMCFK-F2D-03BL Blue Coolant Filter Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke

Mishimoto

Mishimoto MMCFK-F2D-03BL Blue Coolant Filter Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke

SKU: MIMMMCFK-F2D-03BL
$188.95
Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT98045057
$99.72

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DIESEL TRUCK EXPERTS STANDING BY

The 6.6L Duramax LB7 under the hood of your 2001-2004 GM Sierra/Silverado 2500/3500 may be one of the best and most efficient engines out there, but even the toughest trucks have some power and performance waiting to be unleashed through various performance modifications. Here at Alligator Performance, we carry a selection of cold air intakes, tuners, fuel upgrades, and turbo upgrades to help you get the most out of your diesel engine. Many of these upgrades like the cold air intakes and fuel upgrades even help promote component longevity so you can enjoy long-lasting and consistent performance without compromise. After you've added a few engine upgrades to your custom build, be sure to check out our premium 2001-2004 GM 6.6L Duramax LB7 Transmission Upgrades to compliment the increase in power you're throwing down! GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2001-2004 6.6L LB7
Tuners & Monitors
Cooling Upgrades
Head Studs & Main Studs
Rods, Pistons & Cams
Heads & Valve Train

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