2011-2016 GM 2500HD/3500HD 6.6L LM Duramax Engine & Performance

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Crate Engines

Crate Engines

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Gaskets, Gasket Kits & Bearings

Gaskets

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Glow Plugs

Glow Plugs

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Head Studs & Main Studs

Head Studs & Main Studs

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Heads & Valve Train

Heads & Valve Train

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Motor Mounts

Motor Mounts

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Oil Pans

Oil Pans

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Rods, Pistons, Cams & More

Rods/Pistons/Cams & More

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Cometic C5882-027 MLS Cylinder Head Gasket - .027 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-027 MLS Cylinder Head Gasket - .027 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-027 MLS Cylinder Head Gasket - .027 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-027
$147.30
Cometic C15375-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C15375-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C15375-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C15375-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC15375-053
$195.30
$216.98
Cometic C15376-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C15376-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C15376-053 .053" inch MLX Cylinder Head Gasket - 4.130" inch Bore | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC15376-053
$195.30
$216.98
BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Dodge RAM 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax
BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Dodge RAM 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax

BD Diesel

BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Dodge RAM 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax

SKU: BDD1081160
$249.95
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD

BD Diesel

BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD

SKU: BDD1057937
$295.95
ARP 900-1150 4.115" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 900-1150 4.115" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 900-1150 4.115" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP900-1150
$97.13
ARP 900-0950 4.095" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 900-0950 4.095" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 900-0950 4.095" Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP900-0950
$97.13
ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins
ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins
ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins

ARP

ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: ARP900-0400
$97.13
ARP 400-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax
ARP 400-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax

ARP

ARP 400-7534 Hex Head Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax

SKU: ARP400-7534
$146.32
ARP 400-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7
ARP 400-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7

ARP

ARP 400-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM 2500HD/3500HD 6.6L Duramax LB7

SKU: ARP400-7532
$108.39
aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

AFE Power

aFe 77-44001 Power Scorcher Tuning Module | 2001-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: AFE77-44001
$473.75
SCT 7416 X4 Power Flash Programmer | 1999-2016 GM Sierra/Silverado 2500HD/3500HD
SCT 7416 X4 Power Flash Programmer | 1999-2016 GM Sierra/Silverado 2500HD/3500HD
SCT 7416 X4 Power Flash Programmer | 1999-2016 GM Sierra/Silverado 2500HD/3500HD
SCT 7416 X4 Power Flash Programmer | 1999-2016 GM Sierra/Silverado 2500HD/3500HD

SCT Performance

SCT 7416 X4 Power Flash Programmer | 1999-2016 GM Sierra/Silverado 2500HD/3500HD

SKU: SCT7416
$399
Cometic C5883-045 MLS Cylinder Head Gasket - .045" inch Bore 4.100" inch LHS | 2007-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-045 MLS Cylinder Head Gasket - .045" inch Bore 4.100" inch LHS | 2007-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-045 MLS Cylinder Head Gasket - .045" inch Bore 4.100" inch LHS | 2007-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-045
$147.30
$163.65
PPE 118034100 Main Stud Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034100 Main Stud Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034100 Main Stud Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034100 Main Stud Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118034100 Main Stud Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118034100
$229.49
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE110090080
$809.99
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118026110
$629.99
Cometic PRO3012T MLX Cylinder Head Gasket - .047" inch Bore 4.130" inch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Cometic PRO3012T MLX Cylinder Head Gasket - .047" inch Bore 4.130" inch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Cometic

Cometic PRO3012T MLX Cylinder Head Gasket - .047" inch Bore 4.130" inch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: COMPRO3012T
$614.20
Wehrli 100409 Stage 1 High Flow Intake Bundle Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100409 Stage 1 High Flow Intake Bundle Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100409 Stage 1 High Flow Intake Bundle Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100409 Stage 1 High Flow Intake Bundle Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wehrli Custom Fab

Wehrli 100409 Stage 1 High Flow Intake Bundle Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: WCF100409-GB
From $1,036.93
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

AFE Power

aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: AFE77-44002
$473.75
Wehrli 100416 Billet Upper Valve Cover Set | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100416 Billet Upper Valve Cover Set | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wehrli Custom Fab

Wehrli 100416 Billet Upper Valve Cover Set | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: WCF100416-GB
From $484.03
Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wehrli Custom Fab

Wehrli 100160 Heavy Duty Engine Mounts | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: WCF100160-GB
From $464.63
Tuner DT8150020109060 FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150020109060 FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150020109060 FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150020109060
$1,399
Tuner DT8150020109050 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150020109050 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150020109050 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150020109050
$1,399
Tuner DT8150020109040 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150020109040 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150020109040 50 State Legal FIVE Tune Pack incl EZ Lynk Auto Agent 2.0 | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150020109040
$1,399

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DIESEL TRUCK EXPERTS STANDING BY

The 2011-2016 GM 6.6L Duramax LML's already comes equipped with tons of horsepower and torque off the factory line, but additional power and performance has never hurt any truck. Here at Alligator Performance, we offer a ton of engine parts and upgrades that are designed specifically to give your 6.6L Duramax engine improved throttle response, power and performance, taking your GM 2500/3500 truck to the next level in every circumstance. Check out our 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 help promote component longevity so you can enjoy a 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 2011-2016 GM 6.6L Duramax LML Transmission Upgrades to compliment the increase in power you're throwing down! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 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>2011-2016 6.6L LML
Tuners & Monitors
Cooling Upgrades
Head Studs & Main Studs
Rods, Pistons & Cams
Heads & Valve Train

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