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

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2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Parts and Accessories

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

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

Crate Engines

Gaskets

Glow Plugs

Head Studs & Main Studs

Heads & Valve Train

Motor Mounts

Oil Pans

Radiators & Cooling Upgrades

Rebuild Kits & Internal Parts

Rods/Pistons/Cams & More

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ORDERS OVER $70

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

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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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Welcome to The Garage – your one-stop shop for all your car care and maintenance needs. From premium oils and filters to top-notch car care products, we have everything you need to keep your vehicle running smoothly and looking its best. Whether you're a DIY enthusiast or a professional mechanic, our carefully curated selection of high-quality products will help you take care of your ride like never before.

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

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

Crate Engines

Gaskets

Glow Plugs

Head Studs & Main Studs

Heads & Valve Train

Motor Mounts

Oil Pans

Radiators & Cooling Upgrades

Rebuild Kits & Internal Parts

Rods/Pistons/Cams & More

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Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal

Wehrli 100025 Coolant Plug for Engine Cover | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP 400-7533 12pt Valve Cover Bolt Kit | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE 119020009 Stainless Steel Heater Hose Connector | 1999-2014 GM Silverado/Sierra 2500HD/3500HD

Fluidampr 830111 External Balance Steel Black Zinc Finish O.D. 8-3/8 In. Performance Damper | 2006-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Sinister SD-WWP-06 Welded Water Pump | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE 119022300 Upper & Lower Coolant Hose Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE 119020092 2 inch OEM Coolant Hose Drain 1/4 inch Bung | Universal

Mahle MS-2218P Main Bearing Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant 12644591 Engine Oil Pump | 2011-2016 GM 2500HD/3500HD 6.6L Duramax LML

PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant 9G Glow Plug | 2006-2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

HP Tuners UC-0000 MPVI3 Single Credit | Universal

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

Edge 98617 EAS Competition Kit | Universal

Edge 98608 EAS Temperature Sensor | Universal

PPE 119021300 Upper & Lower Coolant Hose Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE 114052120 High-Capacity Black Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Fleece FPE-LML-RES Resonator Delete Plate | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Edge 98653 EAS Shift On The Fly Accessory | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Wagler C6664 Push Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

FREE SHIPPING ON ALL ORDERS OVER $70

PRICE MATCH GUARANTEE

BUILD NOW, PAY LATER FINANCING OPTIONS

30-DAY RETURN SATISFACTION GUARANTEE

DIESEL TRUCK EXPERTS STANDING BY

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

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