2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Engine & Performance

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Crate Engines

Crate Engines

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Gaskets, Gasket Kits & Bearings

Gaskets

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Glow Plugs

Glow Plugs

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Head Studs & Main Studs

Head Studs & Main Studs

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Heads & Valve Train

Heads & Valve Train

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Motor Mounts

Motor Mounts

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Oil Pans

Oil Pans

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Rods, Pistons, Cams & More

Rods/Pistons/Cams & More

Loading products...
Filter
281 products
Sort by:
Best selling
PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE113061094
$47.69
PPE 118021418 Valve Cover Kit with out Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 118021418 Valve Cover Kit with out Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021418 Valve Cover Kit with out Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021418
$287.99
PPE 118021412 Valve Cover Kit with out Pillars - Red | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 118021412 Valve Cover Kit with out Pillars - Red | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021412 Valve Cover Kit with out Pillars - Red | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021412
$287.99
PPE 118021230 Valve Cover Kit with Pillars - Polished | 2005-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 118021230 Valve Cover Kit with Pillars - Polished | 2005-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021230 Valve Cover Kit with Pillars - Polished | 2005-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021230
$305.99
uner DT1140010101009 Switch on the Fly Tune incl EFI Live Spade 49 State Legal | 2007.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM
uner DT1140010101009 Switch on the Fly Tune incl EFI Live Spade 49 State Legal | 2007.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM

Duramax Tuner

uner DT1140010101009 Switch on the Fly Tune incl EFI Live Spade 49 State Legal | 2007.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM

SKU: DMTDT1140010101009
$1,140
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD
BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD

BD Diesel

BD Diesel 1057937 Throttle Sensitivity Booster V3.0 | 2007-2019 GM Sierra/Silverado 2500HD/3500HD

SKU: BDD1057937
$279.95
$295
DFC Diesel 6607510LMMSOASBCC Speed of Air Short Block (STD/AUTO) Callies Crankshaft | 2007.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LMM
DFC Diesel 6607510LMMSOASBCC Speed of Air Short Block (STD/AUTO) Callies Crankshaft | 2007.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LMM
DFC Diesel 6607510LMMSOASBCC Speed of Air Short Block (STD/AUTO) Callies Crankshaft | 2007.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LMM

DFC Diesel

DFC Diesel 6607510LMMSOASBCC Speed of Air Short Block (STD/AUTO) Callies Crankshaft | 2007.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LMM

SKU: DDU6607510LMMSOASBCC
$13,096.85
Industrial 44B112 Coated & De-Lipped X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B112 Coated & De-Lipped X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B112 Coated & De-Lipped X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B112 Coated & De-Lipped X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B112 Coated & De-Lipped X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B112
$2,327.95
$2,399.95
Industrial 44B111 Coated & De-Lipped X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B111 Coated & De-Lipped X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B111 Coated & De-Lipped X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B111 Coated & De-Lipped X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B111 Coated & De-Lipped X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B111
$2,327.95
$2,399.95
Industrial 44B110 Coated & De-Lipped X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B110 Coated & De-Lipped X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B110 Coated & De-Lipped X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B110 Coated & De-Lipped X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B110 Coated & De-Lipped X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B110
$2,327.95
$2,399.95
Industrial 44B109 Coated & De-Lipped X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B109 Coated & De-Lipped X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B109 Coated & De-Lipped X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B109 Coated & De-Lipped X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B109 Coated & De-Lipped X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B109
$2,327.95
$2,399.95
Industrial 44B104 X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B104 X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B104 X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B104 X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Alligator Performance

Industrial 44B104 X-Series Piston Kit (.040) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B104
$1,842.95
$1,899.95
Industrial 44B103 X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B103 X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B103 X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B103 X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B103 X-Series Piston Kit (.030) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B103
$1,842.95
$1,899.95
Industrial 44B102 X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B102 X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B102 X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B102 X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B102 X-Series Piston Kit (.020) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B102
$1,842.95
$1,899.95
Industrial 44B101 X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B101 X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B101 X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax
Industrial 44B101 X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Industrial Injection

Industrial 44B101 X-Series Piston Kit (Standard) | 2001-2016 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

SKU: IIS44B101
$1,842.95
$1,899.95
Mahle 2243935WR Engine Piston | 2010-2016 GM Sierra/Silverado 2500HD/35000HD 6.6L Duramax
IN STOCK
Mahle 2243935WR Engine Piston | 2010-2016 GM Sierra/Silverado 2500HD/35000HD 6.6L Duramax
Mahle 2243935WR Engine Piston | 2010-2016 GM Sierra/Silverado 2500HD/35000HD 6.6L Duramax

Mahle

Mahle 2243935WR Engine Piston | 2010-2016 GM Sierra/Silverado 2500HD/35000HD 6.6L Duramax

SKU: MCI2243935WR
$110
$175.53
Mahle 54597 1.05mm Thick Wave Stopper Head Gasket (Left) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
Mahle 54597 1.05mm Thick Wave Stopper Head Gasket (Left) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 54597 1.05mm Thick Wave Stopper Head Gasket (Left) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54597
$183.51
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 110100113 CNC Ported Cast Iron Cylinder Head | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE110100113
$1,709.99
$1,899.99
ARP 130-1801 12pt Oil Pan Bolt Kit | 2001-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LMM
ARP 130-1801 12pt Oil Pan Bolt Kit | 2001-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LMM

ARP

ARP 130-1801 12pt Oil Pan Bolt Kit | 2001-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LB7/LMM

SKU: ARP130-1801
$46.82
ARP 430-0203 SS 12pt Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM
ARP 430-0203 SS 12pt Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

ARP

ARP 430-0203 SS 12pt Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

SKU: ARP430-0203
$79.06
ARP 430-0202 SS 12pt Lower Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM
ARP 430-0202 SS 12pt Lower Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

ARP

ARP 430-0202 SS 12pt Lower Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

SKU: ARP430-0202
$100.25
ARP 130-0203 Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM
ARP 130-0203 Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

ARP

ARP 130-0203 Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY/LMM

SKU: ARP130-0203
$56.22
Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
IN STOCK
Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100443 Black Anodized Billet Oil Fill Tube Cap | 2001-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100443
$51.41
PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD/3500HD6.6L Duramax
IN STOCK
PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD/3500HD6.6L Duramax
PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD/3500HD6.6L Duramax
PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD/3500HD6.6L Duramax

PPE

PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD/3500HD6.6L Duramax

SKU: PPE110090053
$539.99
$599.99

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

The GM 2500/3500's equipped with a 6.6L Duramax LMM under the hood already come 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 situation. 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 even help promote component longevity so you can enjoy 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 2007.5-2010 GM 6.6L Duramax LMM Transmission Upgrades to compliment the increase in power you're throwing down! GM Duramax Fitments: 2007, 2008, 2009, 2010 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>2007.5-2010 6.6L LMM
Tuners & Monitors
Cooling Upgrades
Head Studs & Main Studs
Rods, Pistons & Cams
Heads & Valve Train

Can We Help You Find Something?

Give us a call: +1-208-719-7400

Chat With Us