LLY Duramax Engine

LLY Duramax Gaskets & Seals

LLY Duramax Rotating Assembly

LLY Duramax Studs & Fasteners

LLY Duramax Cooling System

LLY Duramax Valvetrain

LLY Duramax Up Pipes

LLY Duramax Oil Pan

LLY Duramax Exhaust Manifolds

Restore or upgrade your 2004.5–2005 LLY Duramax 6.6L engine with top-tier components built for power, reliability, and longevity. From complete long blocks to internal engine parts like pistons, camshafts, and bearings, every product is engineered to meet or exceed OEM standards. Whether you're performing a full rebuild or a performance upgrade, our high-quality LLY Duramax engine parts deliver the strength and durability your diesel demands.

54 Items

Duramax Billet Engine Oil Cap AFE 79-12002 — Duramax Billet Engine Oil Cap AFE 79-12002 $88.13
Fits: Duramax 2001-2015

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Oil Catch Can Mishimoto MMOCC-RB — Oil Catch Can Mishimoto MMOCC-RB $127.95
Fits: Universal

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LB7|LLY|LBZ Duramax Amp Alternator XDP 220 — LB7|LLY|LBZ Duramax Amp Alternator XDP 220 $299.95
Fits: Duramax 2001-2007

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Duramax Gear Reduction Starter XDP XD251 — Duramax Gear Reduction Starter XDP XD251 $299.95
Fits: Duramax 2001-2019

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Duramax Gear Reduction Starter Mean Green 6600 — Duramax Gear Reduction Starter Mean Green 6600 $419.00
Fits: Duramax 2001-2019

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LB7|LLY|LBZ Duramax High Output Alternator XDP XD355 — LB7|LLY|LBZ Duramax High Output Alternator XDP XD355 $470.95
Fits: Duramax 2001-2007

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Duramax Power Belt Tensioner Alliant AP63449 — Duramax Power Belt Tensioner Alliant AP63449 $134.49
Fits: Duramax 2002-2016

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Duramax CAT Fuel Filter Adapter Sinister Diesel SD-CAT-DMAX — Duramax CAT Fuel Filter Adapter Sinister Diesel SD-CAT-DMAX $149.99
Fits: Duramax 2001-2016

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LB7|LLY|LBZ Duramax High Output Alternator Mean Green 8247 — LB7|LLY|LBZ Duramax High Output Alternator Mean Green 8247 $419.00
Fits: Duramax 2001-2007

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Silverado HD Clutch Master Cylinder Push Rod Bushing GM 12473050 — Silverado HD Clutch Master Cylinder Push Rod Bushing GM 12473050 $28.59
Fits: Chevrolet Silverado HD 1999-2013 & 2015-2018

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Duramax 2004-2010 Engine Coolant Hose GM 97354884 — Duramax 2004-2010 Engine Coolant Hose GM 97354884 $30.64
Fits: Duramax 2004-2010

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Duramax Billet Aluminum Oil Cap XDP XD477 — Duramax Billet Aluminum Oil Cap XDP XD477 $29.95
Fits: Duramax 2001-2021

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Battery Extender 12V 1.5A Auto Meter BEX-1500 — Battery Extender 12V 1.5A Auto Meter BEX-1500 $54.04
Fits: Universal - 12 Volts, 1.5 Amp

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Manual Control Positive Air Shutdown BD 1036733-M — Manual Control Positive Air Shutdown BD 1036733-M $723.95
Fits: Universal - 4 Inch Intake Systems

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Positive Air Shutdown With Electric Control BD 1036739 — Positive Air Shutdown With Electric Control BD 1036739 $996.95
California Restricted

Fits: Universal - 4 Inch Intake Systems

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Universal Carbon Fiber Oil Catch Can Mishimoto MMOCC-CF — Universal Carbon Fiber Oil Catch Can Mishimoto MMOCC-CF $162.95
California Restricted

Fits: Universal - Many Applications

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Universal High-Flow Baffled Catch Can Kit Mishimoto MMBCC-HF — Universal High-Flow Baffled Catch Can Kit Mishimoto MMBCC-HF $280.95
California Restricted

Fits: Universal - Many Applications

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Duramax 01-19 Rear 180 Degree Thermostat AcDelco 131-131 — Duramax 01-19 Rear 180 Degree Thermostat AcDelco 131-131 $44.84
Fits: Duramax 2001-2019

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Duramax Starter Bolt GM 97329632 — Duramax Starter Bolt GM 97329632 $6.56
Fits: Duramax 2001-2018

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Duramax OE Crankshaft Balancer Bolt GM 97329601 — Duramax OE Crankshaft Balancer Bolt GM 97329601 $19.39
Fits: Duramax 2001-2022

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Duramax Engine Lower Valve Cover Dowel Pin GM 97014295 — Duramax Engine Lower Valve Cover Dowel Pin GM 97014295 $6.40
Fits: Duramax 2004.5-2020

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Duramax 01-19 Battery Retainer GM 84109393 — Duramax 01-19 Battery Retainer GM 84109393 $7.77
Fits: 2500/3500HD Silverado | Sierra 2001-2019

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LLY/LBZ/LMM Duramax Cast Iron Cylinder Head PPE 110100103 — LLY/LBZ/LMM Duramax Cast Iron Cylinder Head PPE 110100103 $1,349.99
Fits: LLY/LBZ/LMM Duramax 2004.5-2010

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Duramax Internal Oil Cooler Delete Kit PPE 114001000 — Duramax Internal Oil Cooler Delete Kit PPE 114001000 $269.99
Fits: LB7 | LLY | LBZ | LMM Duramax 2001-2010

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Electronic Control Positive Air Shutdown BD 1036733 — Electronic Control Positive Air Shutdown BD 1036733 $996.95
Fits: Universal - 4 Inch Intake Systems

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Baffled Oil Catch Can Mishimoto MMBCC-UNI — Baffled Oil Catch Can Mishimoto MMBCC-UNI $349.95
California Restricted

Fits: Universal - Many Applications

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Large Aluminum Oil Catch Can Mishimoto MMOCC-LA — Large Aluminum Oil Catch Can Mishimoto MMOCC-LA $127.95
California Restricted

Fits: Universal - Many Applications

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Duramax Oil Cooler Adapter Fleece FPE-DMAX-OCADPT — Duramax Oil Cooler Adapter Fleece FPE-DMAX-OCADPT $99.00
Fits: LB7/LLY/LBZ Duramax 2001-2007 | LML Duramax 2011-2016

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5.9/6.7 Cummins Rail Pressure Sensor Pigtail Fleece FPE-HAR-RP-PT — 5.9/6.7 Cummins Rail Pressure Sensor Pigtail Fleece FPE-HAR-RP-PT $25.99
Fits: Duramax 2011-2016 | Cummins 2003-2012

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2001-2023 Duramax Harmonic Balancer Washer ARP 200-8793 — 2001-2023 Duramax Harmonic Balancer Washer ARP 200-8793 $10.35
Fits: 2001-2023 Duramax

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2001-2016 Duramax Diesel Custom Age 625+ Head Stud Kit ARP 230-4202 — 2001-2016 Duramax Diesel Custom Age 625+ Head Stud Kit ARP 230-4202 $2,196.48
Fits: 2001-2016 Duramax

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Duramax 2001-2006 H-Series Rod Bearing (Standard) Clevite CB-1805H — Duramax 2001-2006 H-Series Rod Bearing (Standard) Clevite CB-1805H $39.64
Fits: Duramax 2001-2016

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Duramax 2001-2016 Fuel Primer Bulb Sealing Kit Fleece FPE-GM-FFPD-0116 — Duramax 2001-2016 Fuel Primer Bulb Sealing Kit Fleece FPE-GM-FFPD-0116 $49.99
Fits: Duramax 2001-2016

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LLY Duramax Vane Position Sensor Adapter Harness Fleece FPE-HAR-DMAX-VPS-ADPT — LLY Duramax Vane Position Sensor Adapter Harness Fleece FPE-HAR-DMAX-VPS-ADPT $46.99
Fits: LLY Duramax 2004.5-2005

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LB7|LLY Duramax Piston With Rings (.020, Left Bank) MAHLE 224-3451WR.020 — LB7|LLY Duramax Piston With Rings (.020, Left Bank) MAHLE 224-3451WR.020 $163.85
Fits: LB7|LLY Duramax 2001-2005

Select Quantity

LB7|LLY Duramax Piston With Rings (.030, Left Bank) MAHLE 224-3451WR.030 — LB7|LLY Duramax Piston With Rings (.030, Left Bank) MAHLE 224-3451WR.030 $168.88
Fits: LB7|LLY Duramax

Select Quantity

LB7|LLY Duramax Piston With Rings (.040, Left Bank) MAHLE 224-3451WR.040 — LB7|LLY Duramax Piston With Rings (.040, Left Bank) MAHLE 224-3451WR.040 $164.55
Fits: LB7|LLY Duramax 2001-2005

Select Quantity

LB7|LLY Duramax Piston With Rings (.040, Right Bank) MAHLE 224-3452WR.040 — LB7|LLY Duramax Piston With Rings (.040, Right Bank) MAHLE 224-3452WR.040 $164.55
Fits: LB7|LLY Duramax 2001-2005

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (Standard, Right Bank) MAHLE 224-3708WR — LLY|LBZ|LMM Duramax Piston With Rings (Standard, Right Bank) MAHLE 224-3708WR $214.66
Fits: LLY|LBZ|LMM Duramax 2006-2010

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (.020, Right Bank) MAHLE 224-3708WR.020 — LLY|LBZ|LMM Duramax Piston With Rings (.020, Right Bank) MAHLE 224-3708WR.020 $214.92
Fits: LLY|LBZ|LMM Duramax 2006-2010

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (.030, Right Bank) MAHLE 224-3708WR.030 — LLY|LBZ|LMM Duramax Piston With Rings (.030, Right Bank) MAHLE 224-3708WR.030 $176.96
Fits: LLY|LBZ|LMM Duramax 2006-2010

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (Standard, Left Bank) MAHLE 224-3709WR — LLY|LBZ|LMM Duramax Piston With Rings (Standard, Left Bank) MAHLE 224-3709WR $214.66
Fits: LLY|LBZ|LMM Duramax 2006-2010

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (.020, Left Bank) MAHLE 224-3709WR.020 — LLY|LBZ|LMM Duramax Piston With Rings (.020, Left Bank) MAHLE 224-3709WR.020 $214.92
Fits: LLY|LBZ|LMM Duramax 2006-2010

Select Quantity

LLY|LBZ|LMM Duramax Piston With Rings (.030, Left Bank) MAHLE 224-3709WR.030 — LLY|LBZ|LMM Duramax Piston With Rings (.030, Left Bank) MAHLE 224-3709WR.030 $177.15
Fits: LLY|LBZ|LMM Duramax 2006-2010

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LML|LLY|LGH Duramax Harmonic Balancer Dorman 594-717 — LML|LLY|LGH Duramax Harmonic Balancer Dorman 594-717 $147.85
Fits: LML Duramax 2011-2016 | LLY/LGH 2010-2016

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Duramax 2006-2010 Performance Diesel Series Damper Fluidampr 830111 — Duramax 2006-2010 Performance Diesel Series Damper Fluidampr 830111 $574.82
Fits: LLY|LBZ|LMM Duramax 2006-2010

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Duramax 2001-2016 Engine Oil Cooler Dorman 918-400 — Duramax 2001-2016 Engine Oil Cooler Dorman 918-400 $415.43
Fits: LB7/LLY|LBZ|LMM|LML

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Duramax 2001-2016 Silicone Bushing Engine Mount Kit - 50 SHD (OE Firmness) PPE 168030150 — Duramax 2001-2016 Silicone Bushing Engine Mount Kit - 50 SHD (OE Firmness) PPE 168030150 $269.99
Fits: LB7|LLY|LBZ|LMM Duramax 2001-2010

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Duramax 2001-2016 Cast Aluminum Piston and Ring Set Kit Mahle Motorsports 930036075 — Duramax 2001-2016 Cast Aluminum Piston and Ring Set Kit Mahle Motorsports 930036075 $1,704.14
Fits: Duramax 2001-2016

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Duramax 2001-16 Cast Aluminum Piston and Ring Set Kit Mahle Motorsports 930036095 — Duramax 2001-16 Cast Aluminum Piston and Ring Set Kit Mahle Motorsports 930036095 $1,704.14
Fits: Duramax 2001-2016

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LLY Duramax New Cylinder Heads Loaded with Valve Train DK Engines DK-GMLLY-CHL — LLY Duramax New Cylinder Heads Loaded with Valve Train DK Engines DK-GMLLY-CHL $699.99
Fits: LLY Duramax 2004.5-2005

Select Quantity

Duramax 2001-10 Improved Gerotor Style High RPM Oil Pump Melling M561 — Duramax 2001-10 Improved Gerotor Style High RPM Oil Pump Melling M561 $252.99
Fits: Duramax 2001-2010

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Duramax 1992-2000 Cylinder Head Bolt Set Mahle GS33193 — Duramax 1992-2000 Cylinder Head Bolt Set Mahle GS33193 $36.23
Fits: Duramax 1992-2000

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Duramax Oil Cooler Upgrade Kit Banks 13252 — Duramax Oil Cooler Upgrade Kit Banks 13252 $645.89
California Restricted

Fits: Duramax 2001-2007 / 2011-2019

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