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

Loading products...
Filter
274 products
Sort by:
Best selling
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK

DFC Diesel

DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK

SKU: DDUSS660104LB7TKSOALB
$13,460.38
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

DFC Diesel

DFC Diesel SS660104LB7SOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

SKU: DDUSS660104LB7SOALB
$13,460.38
Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100131 X PPE High-Capacity Aluminum Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100131-GB
From $367.63
Wagler C6686-2 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6686-2 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6686-2 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6686-2
$975
Wagler C6686-1 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
Wagler C6686-1 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6686-1 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6686-1 Alternate Fire Camshaft | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6686-1
$975
Wagler C6618 Billet Rocker Bridges | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6618 Billet Rocker Bridges | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6618 Billet Rocker Bridges | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6618
$446.88
Victor Reinz 61-36460-20 Engine Cylinder Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Victor Reinz 61-36460-20 Engine Cylinder Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Victor Reinz

Victor Reinz 61-36460-20 Engine Cylinder Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: VRZ61-36460-20
$80.17
Mahle 54581/54584 Victor Reinz 1.00mm Thick Left and Right Head Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle 54581/54584 Victor Reinz 1.00mm Thick Left and Right Head Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Victor Reinz

Mahle 54581/54584 Victor Reinz 1.00mm Thick Left and Right Head Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54581/54584
$148.96
SoCal Diesel LB7stage2 Stage 2 LB7 Cylinder Heads | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
SoCal Diesel LB7stage2 Stage 2 LB7 Cylinder Heads | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SoCal Diesel

SoCal Diesel LB7stage2 Stage 2 LB7 Cylinder Heads | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: SLDLB7stage2
$4,000
PPE 119025100 Upper & Lower Coolant Hose Kit - Orange | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 119025100 Upper & Lower Coolant Hose Kit - Orange | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119025100 Upper & Lower Coolant Hose Kit - Orange | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119025100
$269.99
PPE 118030800 Connecting Rods | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118030800 Connecting Rods | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118030800 Connecting Rods | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118030800
$2,699.99
PPE 116454025 Coolant Overflow Tank | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 116454025 Coolant Overflow Tank | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 116454025 Coolant Overflow Tank | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE116454025
$269.99
PPE 114051100 Dry Sump 5 Stage Steel Gear Oil Pump | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 114051100 Dry Sump 5 Stage Steel Gear Oil Pump | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114051100 Dry Sump 5 Stage Steel Gear Oil Pump | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114051100
$1,799.99
Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins
IN STOCK
Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Mishimoto

Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: MIMMMHOSE-RAM-03DBK
$357.95
Mishimoto MMHOSE-CHV-96DRD Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel
Mishimoto MMHOSE-CHV-96DRD Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel

Mishimoto

Mishimoto MMHOSE-CHV-96DRD Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel

SKU: MIMMMHOSE-CHV-96DRD
$365.95
Mishimoto MMHOSE-CHV-96DBL Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel
Mishimoto MMHOSE-CHV-96DBL Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel

Mishimoto

Mishimoto MMHOSE-CHV-96DBL Silicone Coolant Hose Kit | 1999-2006 GM Silverado/Sierra 6.5L Turbo Diesel

SKU: MIMMMHOSE-CHV-96DBL
$365.95
Merchant 930029875 De-Lipped Motorsport Piston Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 930029875 De-Lipped Motorsport Piston Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 930029875 De-Lipped Motorsport Piston Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT930029875
$1,832.72
Merchant 63G Glow Plug | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Merchant 63G Glow Plug | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Merchant Automotive

Merchant 63G Glow Plug | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: MAT63G
$39.93
Merchant 10196 Automotive Upper Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Merchant 10196 Automotive Upper Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Merchant Automotive

Merchant 10196 Automotive Upper Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: MAT10196
$9.72
Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial PDM-DMXAFS1 Alternate Fire Billet Race Stage 1 Camshaft with Key | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: IISPDM-DMXAFS1
$1,760.50
Industrial PDM-LB7STKLB Stock Long Block | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Industrial PDM-LB7STKLB Stock Long Block | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Industrial Injection

Industrial PDM-LB7STKLB Stock Long Block | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: IISPDM-LB7STKLB
$18,429.95
Industrial PDM-362.040injections Forged .040 Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-362.040injections Forged .040 Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial PDM-362.040injections Forged .040 Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: IISPDM-362.040
$3,199.14
Industrial PDM-362STD Injections Forged Standard Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-362STD Injections Forged Standard Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial PDM-362STD Injections Forged Standard Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: IISPDM-362STD
$3,199.14
Industrial PDM-362.020injections Forged .020 Oversize Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Industrial PDM-362.020injections Forged .020 Oversize Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial PDM-362.020injections Forged .020 Oversize Mahle Race Pistons Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: IISPDM-362.020
$4,135.06

FREE SHIPPING ON ALL
ORDERS OVER $70

PRICE MATCH GUARANTEE

BUILD NOW, PAY LATER
FINANCING OPTIONS

30-DAY RETURN SATISFACTION GUARANTEE

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

Can We Help You Find Something?

Give us a call: +1-208-719-7400

Chat With Us