123 products

LLY Duramax | 2004.5–2005

Shop parts for 2004.5–2005 GM trucks equipped with the 6.6L LLY Duramax. Browse injectors, fuel system components, turbo and intake upgrades, cooling system parts, engine components, transmission upgrades, maintenance items, and performance parts selected for LLY applications. Always verify your exact year, model, and product fitment before ordering.

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123 matching products Browse products ↓
SALE Merchant 97209342 Duramax Rear Main Seal
Merchant Automotive

Merchant Automotive Rear Main Seal - 2001-2021 GM 6.6L Duramax

$77.95$74.95
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SALE Merchant Automotive 10461 Transfer Case Kit
Merchant Automotive

Merchant Automotive Deluxe Bearing & Seal Kit - NP261HD - 2001-2007 GM Duramax

$159.93$153.95
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SALE ARP 672-1003 Duramax Up-Pipe Bolts
ARP

ARP Chromoly Up-Pipe Bolts - 2001-2016 GM Duramax

$50.05$48.95
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SALE ARP 230-2801 Duramax Flywheel Bolts
ARP

ARP 45mm Flywheel Bolt Kit - 2001-2006 GM Duramax

$98.48$94.95
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SALE ARP 230-2901 Duramax Flexplate Bolts
ARP

ARP 45mm Flexplate Bolt Kit - 2001-2010 GM Duramax

$100.75$96.95
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SALE Industrial Injection PDM-CB-1805HC
Industrial Injection

Industrial Injection Coated H-Series Rod Bearing Set - 2001-2016 GM Duramax

$532.48$511.99
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SALE Industrial Injection PDM-CB-1805HXC
Industrial Injection

Industrial Injection Coated HX-Series Rod Bearing Set +.001 - 2001-2016 GM Duramax

$553.82$531.99
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SALE ARP 100-7534 Duramax Valve Cover Bolts
ARP

ARP Black Oxide Hex Valve Cover Bolt Kit - 2004-2016 GM Duramax

$138.00$132.99
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SALE ARP 400-7534 Duramax Valve Cover Bolts
ARP

ARP Stainless Hex Valve Cover Bolt Kit - 2004-2016 GM Duramax

$191.34$183.95
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SALE ARP 400-7533 Duramax Valve Cover Bolts
ARP

ARP Stainless 12-Point Valve Cover Bolt Kit - 2004-2016 GM Duramax

$214.62$206.95
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SALE Merchant 10184 Duramax Pushrods
Merchant Automotive

Merchant Automotive Heavy Duty Pushrod Kit - 2001-2010 GM Duramax

$340.99$327.99
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SALE Wagler WCPC6664 Duramax Pushrods
Wagler

Wagler Heavy Duty Pushrod Set - 2001-2016 GM Duramax

$444.95$427.95
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SALE DTech DT660016 Duramax Valve Cover Gasket
DTech

DTech Valve Cover Gasket - 2004.5-2010 GM Duramax

$42.14$40.99
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SALE DTech DT660023 Duramax Return Line Kit
DTech

DTech Injector Return Line Kit - 2004.5-2010 GM Duramax

$21.37$20.95
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SALE MAHLE CS54580 Duramax Conversion Set
MAHLE

MAHLE Engine Conversion Gasket Set - 2001-2007 GM Duramax

$138.95$133.99
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SALE Alliant AP0162 Duramax Turbo Install Kit
Alliant Power

Alliant Power Turbocharger Installation Kit - 2001-2010 GM Duramax

$81.00$77.99
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SALE MAHLE 95-3727 Duramax Gasket Kit
MAHLE

MAHLE Complete Engine Gasket Kit - 2004.5-2007 GM Duramax

$404.95$388.95
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SALE Alliant AP0046 Duramax Head Install Kit
Alliant Power

Alliant Power Head Gasket Installation Kit - 2004.5-2010 GM Duramax

$1,492.86$1,433.99
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SALE ARP 230-4202 Duramax 625+ Head Studs
ARP

ARP Custom Age 625+ Head Stud Kit - 2001-2016 GM 6.6L Duramax

$1,835.95$1,762.99
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SALE Mishimoto MMRAD-DMAX-01 Duramax Radiator
Mishimoto

Mishimoto Aluminum Performance Radiator - 2001-2005 GM Duramax LB7/LLY

$949.95$911.99
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SALE Fleece FPE-VNT63-STREET Duramax Cheetah Turbo
Fleece Performance

Fleece 63mm VNT Cheetah Turbo - 2004.5-2010 Duramax LLY/LBZ/LMM

$2,599.00$2,495.99
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SALE FASS DMAX7001 Duramax Flow Enhancer
FASS

FASS Dura-Max Flow Enhancer - 2001-2010 GM Duramax

$459.00$440.95
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SALE S&B 75-5080D LLY LBZ Intake
S&B

S&B Cold Air Intake - Dry Filter - 2006-2007 GM 6.6L LLY/LBZ Duramax

$379.00$363.95
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SALE S&B Cold Air Intake - Cleanable Filter - 2006-2007 GM 6.6L LLY/LBZ Duramax - additional product view
S&B

S&B Cold Air Intake - Cleanable Filter - 2006-2007 GM 6.6L LLY/LBZ Duramax

$379.00$363.95
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Diesel parts guide

Shopping LLY Duramax | 2004.5–2005

Hilltop Diesel Performance organizes parts around real truck fitment so you can move from platform to the component you need without digging through an unrelated catalog. For Duramax applications, start with your exact year and engine, then verify configuration-specific notes on the product page before ordering.

Common upgrade and service paths include fuel delivery, injectors, turbochargers, intake and charge-air parts, exhaust, cooling, transmission components, filtration, sensors, gaskets, hardware and supporting installation parts.