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

2011-2016 6.6L Silverado & Sierra 2500HD/3500HD

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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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 Applications
SCT 7416 X4 Power Flash Programmer | 1999-2016 Applications
SCT 7416 X4 Power Flash Programmer | 1999-2016 Applications
SCT 7416 X4 Power Flash Programmer | 1999-2016 Applications

SCT Performance

SCT 7416 X4 Power Flash Programmer | 1999-2016 Applications

SKU: SCT7416
$339.15
$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
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 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE110090050
$539.99
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 110100105 Cast Iron Cylinder Head | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 110100105 Cast Iron Cylinder Head | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 110100105 Cast Iron Cylinder Head | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 110100105 Cast Iron Cylinder Head | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE

PPE 110100105 Cast Iron Cylinder Head | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: PPE110100105
$1,349.99
Choate Engineering CEP66LMLLW Long Block Workhorse Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLLW Long Block Workhorse Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLLW Long Block Workhorse Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLLW
$14,800
$16,100
PPE 118026010 Stage 1 Performance Camshaft - Standard Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026010 Stage 1 Performance Camshaft - Standard Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026010 Stage 1 Performance Camshaft - Standard Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026010 Stage 1 Performance Camshaft - Standard Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118026010 Stage 1 Performance Camshaft - Standard Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118026010
$629.99
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
Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Choate Engineering

Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: CHTCEP66BIOP
$180
Choate Engineering CEP66LMLSC 6.6L Duramax LML Model C Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLSC 6.6L Duramax LML Model C Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLSC 6.6L Duramax LML Model C Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLSC
$7,800
Choate Engineering CEP66LMLSW 6.6L Duramax LML Workhorse Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLSW 6.6L Duramax LML Workhorse Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLSW 6.6L Duramax LML Workhorse Short Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLSW
$11,100
Choate Engineering CEP66LMLLC 6.6L Duramax LML Model C Long Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLLC 6.6L Duramax LML Model C Long Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLLC 6.6L Duramax LML Model C Long Block | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLLC
$7,700
$9,000
Choate Engineering CEP66LMLLD 6.6L Duramax LML Long Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLLD 6.6L Duramax LML Long Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLLD 6.6L Duramax LML Long Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLLD
$12,999
Choate Engineering CEP66LMLSD 6.6L Duramax LML Short Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Choate Engineering CEP66LMLSD 6.6L Duramax LML Short Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Choate Engineering

Choate Engineering CEP66LMLSD 6.6L Duramax LML Short Block Daily Driver Crate Engine | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CHTCEP66LMLSD
$9,000
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 $1,007.83
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 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wehrli Custom Fab

Wehrli 100696 Upper Coolant Pipe Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: WCF100696-GB
From $151.32
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

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2011-2016 6.6L Silverado & Sierra 2500HD/3500HD

Power Lift Shop All

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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