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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Comp Cams 701-32 Valve Spring Steel Retainers | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Comp Cams 701-32 Valve Spring Steel Retainers | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Comp Cams

Comp Cams 701-32 Valve Spring Steel Retainers | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: CPC701-32
$163.95
Carrillo DR7022 High-Performance Piston Set | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Carrillo DR7022 High-Performance Piston Set | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Carrillo

Carrillo DR7022 High-Performance Piston Set | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: CRLDR7022SET
$3,284.40
Cometic C5883-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-075
$195.30
Cometic C5883-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-051
$147.30
Cometic C5883-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-056
$195.30
Cometic C5883-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-060
$195.30
Cometic C5883-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5883-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5883-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5883-040
$147.30
Cometic C5882-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch RHS | 01-16 GM Silverado/Sierra 2500HD, 07-16 3500HD Duramax
Cometic C5882-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch RHS | 01-16 GM Silverado/Sierra 2500HD, 07-16 3500HD Duramax

Cometic

Cometic C5882-075 MLS Cylinder Head Gasket - .075 inch Bore 4.100 inch RHS | 01-16 GM Silverado/Sierra 2500HD, 07-16 3500HD Duramax

SKU: COMC5882-075
$195.30
Cometic C5882-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-060 MLS Cylinder Head Gasket - .060 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-060
$195.30
Cometic C5882-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-051 MLS Cylinder Head Gasket - .051 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-051
$147.30
Cometic C5882-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-056 MLS Cylinder Head Gasket - .056 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-056
$195.30
Cometic C5882-045 MLS Cylinder Head Gasket - .045 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-045 MLS Cylinder Head Gasket - .045 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-045 MLS Cylinder Head Gasket - .045 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-045
$147.30
Cometic C5882-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C5882-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C5882-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch RHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC5882-040
$147.30
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

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
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
Cometic C15043 17-Bolt Fiber Oil Pan Gasket Lower - .060 inch | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Cometic C15043 17-Bolt Fiber Oil Pan Gasket Lower - .060 inch | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Cometic

Cometic C15043 17-Bolt Fiber Oil Pan Gasket Lower - .060 inch | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: COMC15043
$19.03
BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 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 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 Ram 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax

SKU: BDD1081160
$244.95
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2020 Applications
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2020 Applications

BD Diesel

BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2020 Applications

SKU: BDD1057937
$289.95
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

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

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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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