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

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

Availability

In Stock 87
Out of Stock 273

Manufacturer

AFE Power 2
ARP 14
BD Diesel 3
Carrillo 1
Choate Engineering 7
Cometic 18
Comp Cams 1
DFC Diesel 4
Duramax Tuner 169
Edge Products 19
EFI Live 4
EzLynk 1
Fleece Performance Products 12
Fluidampr 1
Gator Fasteners 2
HP Tuners 1
Industrial Injection 15
Mahle 9
Merchant Automotive 12
Powerstroke Products 1
PPE 40
SCT Performance 1
Sinister Diesel 1
SoCal Diesel 1
Victor Reinz 5
Wagler Competition Products 6
Wehrli Custom Fab 10

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Make

Dodge RAM 1
Dodge RAM/Ford/GM 1
Ford/Chevrolet/GM/GMC/RAM/Dodge RAM/Universal 21
Ford/Dodge RAM 1
GM 1
GM/Chevrolet/GMC 328
GM/GMC/Chevrolet 5
GM/GMC/Chevrolet/Dodge RAM/RAM/Ford/Universal 1
RAM/Dodge RAM/GMC/Chevrolet 1

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Model

Sierra/Silverado 6
Silverado/Sierra 328
Super Duty 1

Year

1989-2007 1
1994-2018 1
1999-2011 1
1999-2014 1
1999-2016 1
1999-2025 1
2001-2004 1
2001-2011 2
2001-2012 1
2001-2016 82
2001-2017 1
2001-2018 1
2001-2019 8
2001-2025 4
2004-2016 2
2004.5-2016 3
2006-2010 2
2006-2015 1
2006-2016 3
2007-2016 1
2007-2019 1
2007.5-2014 1
2008-2019 1
2011 28
2011-2012 1
2011-2014 2
2011-2015 1
2011-2016 44
2012 28
2013 28
2014 28
2015 28
2015-2016 1
2016 28
Universal 22

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Price

$29,059.40

Rating

0-1 341
2-3 1
4.3 1
4+ 6

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Availability

In Stock 87
Out of Stock 273

Manufacturer

AFE Power 2
ARP 14
BD Diesel 3
Carrillo 1
Choate Engineering 7
Cometic 18
Comp Cams 1
DFC Diesel 4
Duramax Tuner 169
Edge Products 19
EFI Live 4
EzLynk 1
Fleece Performance Products 12
Fluidampr 1
Gator Fasteners 2
HP Tuners 1
Industrial Injection 15
Mahle 9
Merchant Automotive 12
Powerstroke Products 1
PPE 40
SCT Performance 1
Sinister Diesel 1
SoCal Diesel 1
Victor Reinz 5
Wagler Competition Products 6
Wehrli Custom Fab 10

Show all Show less

Make

Dodge RAM 1
Dodge RAM/Ford/GM 1
Ford/Chevrolet/GM/GMC/RAM/Dodge RAM/Universal 21
Ford/Dodge RAM 1
GM 1
GM/Chevrolet/GMC 328
GM/GMC/Chevrolet 5
GM/GMC/Chevrolet/Dodge RAM/RAM/Ford/Universal 1
RAM/Dodge RAM/GMC/Chevrolet 1

Show all Show less

Model

Sierra/Silverado 6
Silverado/Sierra 328
Super Duty 1

Year

1989-2007 1
1994-2018 1
1999-2011 1
1999-2014 1
1999-2016 1
1999-2025 1
2001-2004 1
2001-2011 2
2001-2012 1
2001-2016 82
2001-2017 1
2001-2018 1
2001-2019 8
2001-2025 4
2004-2016 2
2004.5-2016 3
2006-2010 2
2006-2015 1
2006-2016 3
2007-2016 1
2007-2019 1
2007.5-2014 1
2008-2019 1
2011 28
2011-2012 1
2011-2014 2
2011-2015 1
2011-2016 44
2012 28
2013 28
2014 28
2015 28
2015-2016 1
2016 28
Universal 22

Show all Show less

Price

$29,059.40

Rating

0-1 341
2-3 1
4.3 1
4+ 6

EZ Lynk 100EE00AA3 Auto Agent 3 Vehicle Diagnostic Scan Tool & Electronic Logging Device | Universal

EzLynk

EZ Lynk 100EE00AA3 Auto Agent 3 Vehicle Diagnostic Scan Tool & Electronic Logging Device | Universal

SKU: EZL100EE00AA3

Sale price: $549
Regular price: $600

Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal

Edge Products

Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal

SKU: EDG84130-3

Price: $511.95

ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal

ARP

ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal

SKU: ARP100-9910

Sale price: $18.13
Regular price: $34.58

ARP 230-4201 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 230-4201 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP230-4201

Sale price: $640.29
Regular price: $899.99

Fleece FPE-LML-CP Rear Engine Cover Coolant Return Plug | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Fleece Performance Products

Fleece FPE-LML-CP Rear Engine Cover Coolant Return Plug | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: FLCFPE-LML-CP

Price: $19.99

Edge 98620 EAS Starter Kit with EGT Cable | Universal

Edge Products

Edge 98620 EAS Starter Kit with EGT Cable | Universal

SKU: EDG98620

Price: $191.95

PPE 114000555 MicroPure Extreme Performance Engine Oil Filter | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114000555 MicroPure Extreme Performance Engine Oil Filter | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114000555

Sale price: $35.99
Regular price: $39.99

Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2017 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2017 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-DMAX-CBOP

Price: $55

EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal

EFI Live

EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal

SKU: EFIACV3

Price: $595

SoCal Diesel DSPLML DSP5 Switch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SoCal Diesel

SoCal Diesel DSPLML DSP5 Switch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: SLDDSPLML

Price: $55

Mahle 54582 Right Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 54582 Right Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54582

Price: $114.43

Mahle 54585 Left Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle 54585 Left Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCI54585

Price: $114.43

Edge 85400-200 CTS3 Diesel Evolution Programmer 50 States Legal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Edge Products

Edge 85400-200 CTS3 Diesel Evolution Programmer 50 States Legal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: EDG85400-200

Price: $749.95

Wehrli 100155 Billet Coolant Heater Core Firewall Fitting | 1999-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100155 Billet Coolant Heater Core Firewall Fitting | 1999-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCF100155

Price: $40.74

PPE 119020086 Coolant Drain Tube | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119020086 Coolant Drain Tube | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119020086

Price: $26.99

Merchant 10479 Exhaust Manifold to Cylinder Head Bolt Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10479 Exhaust Manifold to Cylinder Head Bolt Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10479

Price: $79.72

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

PPE

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

SKU: PPE119020009

Price: $19.79

Merchant 450402C Head Gasket Kit with ARP Studs and Exhaust Manifold Gaskets | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Merchant Automotive

Merchant 450402C Head Gasket Kit with ARP Studs and Exhaust Manifold Gaskets | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: MAT450402C

Price: $1,275.63

Merchant 10543 Water Pump Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10543 Water Pump Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10543

Price: $279.75

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

Fleece Performance Products

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

SKU: FLCFPE-LML-RES

Sale price: $39.99
Regular price: $41.99

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

ARP

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

SKU: ARP100-9911

Sale price: $27.26
Regular price: $52.01

EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

EFI Live

EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: EFIFS3-GM

Price: $1,025

EFI Live FS3-GM-DC Flashscan V3 | 2001-2016 GMC & RAM Applications

EFI Live

EFI Live FS3-GM-DC Flashscan V3 | 2001-2016 GMC & RAM Applications

SKU: EFIFS3-GM-DC

Price: $1,891.27

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

PPE

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

SKU: PPE119022300

Price: $269.99

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

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

Loading products...

EZ Lynk 100EE00AA3 Auto Agent 3 Vehicle Diagnostic Scan Tool & Electronic Logging Device | Universal

Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal

ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal

ARP 230-4201 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece FPE-LML-CP Rear Engine Cover Coolant Return Plug | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Edge 98620 EAS Starter Kit with EGT Cable | Universal

PPE 114000555 MicroPure Extreme Performance Engine Oil Filter | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2017 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal

SoCal Diesel DSPLML DSP5 Switch | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Mahle 54582 Right Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle 54585 Left Side Cylinder Head Gasket (Grade C 1.05mm) | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Edge 85400-200 CTS3 Diesel Evolution Programmer 50 States Legal | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wehrli 100155 Billet Coolant Heater Core Firewall Fitting | 1999-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE 119020086 Coolant Drain Tube | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant 10479 Exhaust Manifold to Cylinder Head Bolt Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

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

Merchant 450402C Head Gasket Kit with ARP Studs and Exhaust Manifold Gaskets | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Merchant 10543 Water Pump Kit | 2006-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

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

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

EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

EFI Live FS3-GM-DC Flashscan V3 | 2001-2016 GMC & RAM Applications

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

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

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ORDERS OVER $70

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