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.
Merchant Automotive Rear Main Seal - 2001-2021 GM 6.6L Duramax
Merchant Automotive Deluxe Bearing & Seal Kit - NP261HD - 2001-2007 GM Duramax
ARP Chromoly Up-Pipe Bolts - 2001-2016 GM Duramax
ARP 45mm Flywheel Bolt Kit - 2001-2006 GM Duramax
ARP 45mm Flexplate Bolt Kit - 2001-2010 GM Duramax
Industrial Injection Coated H-Series Rod Bearing Set - 2001-2016 GM Duramax
Industrial Injection Coated HX-Series Rod Bearing Set +.001 - 2001-2016 GM Duramax
ARP Black Oxide Hex Valve Cover Bolt Kit - 2004-2016 GM Duramax
ARP Stainless Hex Valve Cover Bolt Kit - 2004-2016 GM Duramax
ARP Stainless 12-Point Valve Cover Bolt Kit - 2004-2016 GM Duramax
Merchant Automotive Heavy Duty Pushrod Kit - 2001-2010 GM Duramax
Wagler Heavy Duty Pushrod Set - 2001-2016 GM Duramax
DTech Valve Cover Gasket - 2004.5-2010 GM Duramax
DTech Injector Return Line Kit - 2004.5-2010 GM Duramax
MAHLE Engine Conversion Gasket Set - 2001-2007 GM Duramax
Alliant Power Turbocharger Installation Kit - 2001-2010 GM Duramax
MAHLE Complete Engine Gasket Kit - 2004.5-2007 GM Duramax
Alliant Power Head Gasket Installation Kit - 2004.5-2010 GM Duramax
ARP Custom Age 625+ Head Stud Kit - 2001-2016 GM 6.6L Duramax
Mishimoto Aluminum Performance Radiator - 2001-2005 GM Duramax LB7/LLY
Fleece 63mm VNT Cheetah Turbo - 2004.5-2010 Duramax LLY/LBZ/LMM
FASS Dura-Max Flow Enhancer - 2001-2010 GM Duramax
S&B Cold Air Intake - Dry Filter - 2006-2007 GM 6.6L LLY/LBZ Duramax
S&B Cold Air Intake - Cleanable Filter - 2006-2007 GM 6.6L LLY/LBZ Duramax
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.