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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PPE 119020300 Upper & Lower Coolant Hose Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 119020300 Upper & Lower Coolant Hose Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE

PPE 119020300 Upper & Lower Coolant Hose Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: PPE119020300
$269.99
PPE 118010400 Xtreme Damper | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 118010400 Xtreme Damper | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE

PPE 118010400 Xtreme Damper | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: PPE118010400
$539.99
Merchant 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Merchant 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Merchant Automotive

Merchant 97188896 Lower Valve Cover Gasket | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: MAT97188896
$56.72
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100442 Billet Oil Fill Tube Cap - Clear Anodized | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100442
$49.47
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 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
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
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 114000559 Engine Oil Filter Socket | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000559 Engine Oil Filter Socket | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000559 Engine Oil Filter Socket | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000559 Engine Oil Filter Socket | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114000559 Engine Oil Filter Socket | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114000559
$35.99
Mishimoto MMOC-F HD Transmission Cooler with Fan | Universal
Mishimoto MMOC-F HD Transmission Cooler with Fan | Universal
Mishimoto MMOC-F HD Transmission Cooler with Fan | Universal
Mishimoto MMOC-F HD Transmission Cooler with Fan | Universal

Mishimoto

Mishimoto MMOC-F HD Transmission Cooler with Fan | Universal

SKU: MIMMMOC-F
$199.95
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax
Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Merchant Automotive

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

SKU: MAT98045060
$99.72
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
Fleece FPE-BRAB-D1 32V Rocker Bridges | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-BRAB-D1 32V Rocker Bridges | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-BRAB-D1 32V Rocker Bridges | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-BRAB-D1
$512.54
Edge 98616 EAS Control Kit | Universal
Edge 98616 EAS Control Kit | Universal

Edge Products

Edge 98616 EAS Control Kit | Universal

SKU: EDG98616
$413.95
Edge 98604 EAS Turbo Timer | Universal
Edge 98604 EAS Turbo Timer | Universal

Edge Products

Edge 98604 EAS Turbo Timer | Universal

SKU: EDG98604
$285.95
Edge 98602 EAS Starter Cable for CS2/CTS2/CTS3 | Universal
Edge 98602 EAS Starter Cable for CS2/CTS2/CTS3 | Universal

Edge Products

Edge 98602 EAS Starter Cable for CS2/CTS2/CTS3 | Universal

SKU: EDG98602
$73.05
Edge 98005 CTS2 Pod Adapter | Universal
Edge 98005 CTS2 Pod Adapter | Universal

Edge Products

Edge 98005 CTS2 Pod Adapter | Universal

SKU: EDG98005
$28.88
Mahle CB-1805P P-Series Rod Bearing | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle CB-1805P P-Series Rod Bearing | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle CB-1805P P-Series Rod Bearing | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCICB-1805P
$15.96
$41.03
Mahle CB-1805H Standard Rod Bearing Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle CB-1805H Standard Rod Bearing Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle CB-1805H Standard Rod Bearing Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCICB-1805H
$34.30
$73.99
ARP 900-0550 4.005 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 900-0550 4.005 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 900-0550 4.005 Bore Ring Compressor | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP900-0550
$97.13
Edge 98607 0-100 PSIG EAS Pressure Sensor
Edge 98607 0-100 PSIG EAS Pressure Sensor

Edge Products

Edge 98607 0-100 PSIG EAS Pressure Sensor

SKU: EDG98607
$207.95
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
$177.95
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
$240.95
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

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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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