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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PPE 113061064 Dual Fueler Idler Pulley 4 inch Diameter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 113061064 Dual Fueler Idler Pulley 4 inch Diameter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 113061064 Dual Fueler Idler Pulley 4 inch Diameter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 113061064 Dual Fueler Idler Pulley 4 inch Diameter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE113061064
$31.49
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT98045060
$99.72
EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal
EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal
EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal

EFI Live

EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal

SKU: EFILIC-FS2-VIN
$125
$129.99
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-DMAX-OC-RED Oil Cap Red | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-DMAX-OC-RED
$39.99
ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 900-0750 4.075 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP900-0750
$97.13
Edge 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal

Edge Products

Edge 98611 EAS Expandable Probe | Universal

SKU: EDG98611
$181.95
Edge 98605 5 Volt EAS Sensor Input | Universal
Edge 98605 5 Volt EAS Sensor Input | Universal
Edge 98605 5 Volt EAS Sensor Input | Universal

Edge Products

Edge 98605 5 Volt EAS Sensor Input | Universal

SKU: EDG98605
$245.95
Mahle 930036055 De-Lipped Cast Piston Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle 930036055 De-Lipped Cast Piston Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 930036055 De-Lipped Cast Piston Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MLE930036055
$1,704.14
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal
Wehrli 100699 Billet Heater Core Fitting with Hose | Universal

Wehrli Custom Fab

Wehrli 100699 Billet Heater Core Fitting with Hose | Universal

SKU: WCF100699
$75.66
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
Wehrli 100647 OEM Placement Coolant Tank Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100647 OEM Placement Coolant Tank Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100647 OEM Placement Coolant Tank Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Wehrli 100647 OEM Placement Coolant Tank Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wehrli Custom Fab

Wehrli 100647 OEM Placement Coolant Tank Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: WCF100647-GB
From $474.33
Merchant 10010 Air Bleeder Screw | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10010 Air Bleeder Screw | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10010 Air Bleeder Screw | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10010
$10.92
Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Fleece Performance Products

Fleece FPE-61-10004-P Cylinder Head (Passenger Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: FLCFPE-61-10004-P
$1,099
Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Fleece Performance Products

Fleece FPE-61-10004-D Cylinder Head (Driver Side) | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: FLCFPE-61-10004-D
$1,099
Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-DMAX-CBOP
$55
$58.79
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML
DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML

DFC Diesel

DFC Diesel 661116LMLLB Long Block Crate Engine | 2011-2016 GM Sierra/Silverado 6.6L Duramax LML

SKU: DDU661116LMLLB
$9,697.11
Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 98045057 Grade C Right Head Gasket | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT98045057
$99.72
Industrial 449E03 Stage 3 Pushrods | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Industrial 449E03 Stage 3 Pushrods | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Industrial 449E03 Stage 3 Pushrods | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Industrial Injection

Industrial 449E03 Stage 3 Pushrods | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: IIS449E03
$37.78
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100442
$51.41
Wagler CRC6.6ST Street Fighter Connecting Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler CRC6.6ST Street Fighter Connecting Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler CRC6.6ST Street Fighter Connecting Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler CRC6.6ST Street Fighter Connecting Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPCRC6.6ST
$1,950
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000

PPE

PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000

SKU: PPE128059160
$13.49
PPE 114051086 Engine Oil Fill Delete Plug (Raw) | 2001-2019 GM Silverado/Sierra 2500HD/3500HD
PPE 114051086 Engine Oil Fill Delete Plug (Raw) | 2001-2019 GM Silverado/Sierra 2500HD/3500HD
PPE 114051086 Engine Oil Fill Delete Plug (Raw) | 2001-2019 GM Silverado/Sierra 2500HD/3500HD

PPE

PPE 114051086 Engine Oil Fill Delete Plug (Raw) | 2001-2019 GM Silverado/Sierra 2500HD/3500HD

SKU: PPE114051086
$17.09
$18.99
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
Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Gator Fasteners

Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: GTFHSK66-CS
$1,419.99

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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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