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 114001000 Internal Oil Cooler Removal Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
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
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
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
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

DFC Diesel

DFC Diesel TH660104LB7SOALBHD Tow/Haul HD Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

SKU: DDUTH660104LB7SOALBHD
$27,677.69
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

DFC Diesel

DFC Diesel TH660104LB7SOALB Tow/Haul Series Speed Of Air Long Block (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

SKU: DDUTH660104LB7SOALB
$18,653.52
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK
DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK

DFC Diesel

DFC Diesel SS660104LB7TKSOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7 TOPKICK

SKU: DDUSS660104LB7TKSOALBCC
$15,539.34
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7
DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

DFC Diesel

DFC Diesel SS660104LB7SOALBCC Street Series Speed Of Air Long Block Callies Crankshaft (Standard/Auto) | 2001-2004 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LB7

SKU: DDUSS660104LB7SOALBCC
$15,539.34
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
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
$450
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
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 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 119021004 EGR to CAB Coolant Hose | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
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 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 118020100 Head Stud Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118020100 Head Stud Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118020100 Head Stud Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118020100
$1,799.99
PPE 116454025 Coolant Overflow Tank | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
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
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
PPE 114010000 Oil Centrifuge Filtration Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
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

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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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