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

2001-2004 6.6L Silverado & Sierra 2500HD/3500HD

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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PPE 149000135 Heat/Sound Insulator Firewall - Silver | 1999-2007 GM Silverado/Sierra
PPE 149000135 Heat/Sound Insulator Firewall - Silver | 1999-2007 GM Silverado/Sierra
PPE 149000135 Heat/Sound Insulator Firewall - Silver | 1999-2007 GM Silverado/Sierra
PPE 149000135 Heat/Sound Insulator Firewall - Silver | 1999-2007 GM Silverado/Sierra

PPE

PPE 149000135 Heat/Sound Insulator Firewall - Silver | 1999-2007 GM Silverado/Sierra

SKU: PPE149000135
$269.99
PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 168030160 Engine Mount Kit 60 Hardness | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE168030160
$269.99
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal

Wehrli Custom Fab

Wehrli 100699 Billet Heater Core Fitting with Hose | Universal

SKU: WCF100699
$73.72
$76
PPE 118034300 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034300 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034300 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034300 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118034300 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118034300
$539.99
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

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

SKU: FLCFPE-DMAX-OC-RED
$39.99
DuramaxTuner 1101A020 DSP5 Switch Blue/Black | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7
DuramaxTuner 1101A020 DSP5 Switch Blue/Black | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7

Duramax Tuner

DuramaxTuner 1101A020 DSP5 Switch Blue/Black | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7

SKU: DMT1101A020
$40
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 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
$1,299.95
BD Diesel 1057735 Throttle Sensitivity Booster | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
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
$277.95
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
Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Merchant Automotive

Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: MAT97321295
$76.72
Merchant 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10233
$24.72
PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114052001
$17.99
PPE 114001050 Coolant Tube Kit for Internal Oil Cooler Removal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114001050 Coolant Tube Kit for Internal Oil Cooler Removal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114001050 Coolant Tube Kit for Internal Oil Cooler Removal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114001050
$179.99
Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54580
$88.86
$185.02
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

SKU: MAT98045060
$99.72
PPE 119000600 Coolant Bypass Tube - Water Pump to Thermostat Housing (Raw) | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119000600 Coolant Bypass Tube - Water Pump to Thermostat Housing (Raw) | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119000600 Coolant Bypass Tube - Water Pump to Thermostat Housing (Raw) | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119000600 Coolant Bypass Tube - Water Pump to Thermostat Housing (Raw) | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119000600
$116.99
Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6641
$750
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
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 114002000 Stainless Steel Remote Oil Filter Mount Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114002000 Stainless Steel Remote Oil Filter Mount Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114002000 Stainless Steel Remote Oil Filter Mount Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114002000
$125.99
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 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 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Merchant 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Merchant Automotive

Merchant 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: MAT97188896
$56.72

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2001-2004 6.6L Silverado & Sierra 2500HD/3500HD

Power Lift Shop All

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 LLY 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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