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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Mahle SH-1999S SH-1999S Cam Shaft Bearing Set | 2001-2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle SH-1999S SH-1999S Cam Shaft Bearing Set | 2001-2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle SH-1999S SH-1999S Cam Shaft Bearing Set | 2001-2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCISH-1999S
$80
$245.57
HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits
HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits
HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits
HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits
HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits

HP Tuners

HP Tuners M03-000-04 MPVI3 OBII Scanning and Calibration Tool with 4 Universal Credits

SKU: HPTM03-000-04
$589.95
Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications
Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications
Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications
Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications
Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications

Edge Products

Edge 85300 Evolution CS2 | GM/Ford/Dodge Applications

SKU: EDG85300
$499.95
ARP 230-4202 Custom Age 625+ Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 230-4202 Custom Age 625+ Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 230-4202 Custom Age 625+ Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP230-4202
$1,727.31
$3,294.60
ARP 129-2503 Harmonic Balancer Bolt Kit | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax V8
ARP 129-2503 Harmonic Balancer Bolt Kit | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax V8

ARP

ARP 129-2503 Harmonic Balancer Bolt Kit | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax V8

SKU: ARP129-2503
$23.92
$45.62
ARP 100-7533 8MM 12pt Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax
ARP 100-7533 8MM 12pt Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax

ARP

ARP 100-7533 8MM 12pt Valve Cover Bolt Kit | 2004.5-2016 GM 2500HD/3500HD 6.6L Duramax

SKU: ARP100-7533
$116.51
Merchant 10251 Automotive Glow Plug Nuts (Set of 8) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10251 Automotive Glow Plug Nuts (Set of 8) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10251 Automotive Glow Plug Nuts (Set of 8) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10251
$4.72
PPE 114052100 High-Capacity Raw Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 114052100 High-Capacity Raw Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 114052100 High-Capacity Raw Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
PPE 114052100 High-Capacity Raw Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

PPE

PPE 114052100 High-Capacity Raw Aluminum Deep Engine Oil Pan | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: PPE114052100
$287.99
Edge 28603 CTS3 Pillar Display Mount | 2007.5-2014 GM Sierra/Silverado 2500HD/3500HD
Edge 28603 CTS3 Pillar Display Mount | 2007.5-2014 GM Sierra/Silverado 2500HD/3500HD
Edge 28603 CTS3 Pillar Display Mount | 2007.5-2014 GM Sierra/Silverado 2500HD/3500HD
Edge 28603 CTS3 Pillar Display Mount | 2007.5-2014 GM Sierra/Silverado 2500HD/3500HD

Edge Products

Edge 28603 CTS3 Pillar Display Mount | 2007.5-2014 GM Sierra/Silverado 2500HD/3500HD

SKU: EDG28603
$71.69
Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Merchant Automotive

Merchant 97321295 Lower Valve Cover Gasket | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

SKU: MAT97321295
$76.72
Fleece FPE-HAR-DMAX-CPS-0416 Crankshaft Position Sensor Pigtail | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-CPS-0416 Crankshaft Position Sensor Pigtail | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-CPS-0416 Crankshaft Position Sensor Pigtail | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-CPS-0416 Crankshaft Position Sensor Pigtail | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-HAR-DMAX-CPS-0416 Crankshaft Position Sensor Pigtail | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-HAR-DMAX-CPS-0416
$21.99
Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 54580 Right Hand Side Head Gasket Grade A | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54580
$88.86
$185.02
PPE 118034250 Harmonic Balancer Bolt 12 Point | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034250 Harmonic Balancer Bolt 12 Point | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034250 Harmonic Balancer Bolt 12 Point | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118034250 Harmonic Balancer Bolt 12 Point | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118034250
$26.99
PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114052001 14mm Billet Hardened Stainless Steel Magnetic Drain Plug for OEM & PPE Engine Oil Pans | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114052001
$17.99
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 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10233 ARP Rocker Shaft Bolt Kit | 2001-2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10233
$24.72
EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal
EFI Live LIC-FS2-VIN Tuning FlashScan V2 VIN License | Universal

EFI Live

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

SKU: EFILIC-FS2-VIN
$125
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
Edge 98203 License Plate Mount Backup Camera For Edge CTS3 & Diablosport Trinity 2 | Universal
Edge 98203 License Plate Mount Backup Camera For Edge CTS3 & Diablosport Trinity 2 | Universal

Edge Products

Edge 98203 License Plate Mount Backup Camera For Edge CTS3 & Diablosport Trinity 2 | Universal

SKU: EDG98203
$277.95
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
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
$73.72
Mahle HS54580C Head Gasket Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Mahle HS54580C Head Gasket Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Mahle

Mahle HS54580C Head Gasket Kit | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: MCIHS54580C
$274.43
$582.27
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
Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6641 Billet Main Caps | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6641
$750

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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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