Optimize airflow and fuel delivery for your 2004.5–2005 LLY Duramax with upgraded intercooler piping, turbo kits, and performance injectors. This section focuses on improving turbo spool and reducing EGTs while maintaining compatibility with stock turbochargers and factory engine management. Includes LLY-specific head studs and fuel system parts for daily driving or towing builds.
OEM AC DELCO HIGH PRESSURE FUEL PUMP - 12711668
Stay with the parts brand your General Motors vehicle came with and get the quality you know and trust with GM Genuine parts. GM Genuine parts...
OEM AC DELCO GLOW PLUG SET - 97326305 / 63G
The GMÂ 97326305Â Glow Plug is a direct replacement for your 2004.5-2005 GM 6.6L Duramax LLY. Replacing failed glow plugs can eliminate check engine lights...
OEM AC DELCO FRONT & REAR THERMOSTATS
The GM 97241129 Front Thermostat is a factory replacement for your 2001-2016 GM 6.6L Duramax. This Thermostat features the same OE activation temp and is a...
MAHLE CYLINDER HEAD GASKET SET - LESS HEAD GASKETS
FITS 04.5-06 GM 6.6L LLY / LBZ DURAMAX DIESEL ENGINES
MAHLE IS A GREAT AFTERMARKET ALTERNATIVE TO OVER-PRICED OEM GASKETS. MAHLE SUPPLIES...
FACTORY FUEL FILTER DELETEÂ
Once you’ve installed an aftermarket Fuel Filtration System such as our FASS, Air Dog or other Fuel Systems, the use of the factory fuel filter is no longer required and...
ENGINE OIL PUMP
fits 01-10 GM 6.6L Duramax Diesel Engines
Melling is a leader in engineering design, development, prototype, testing and assembly of fluid delivery products and related items...
Our PCV Reroute kit allows you to reroute the restrictive factory hoses. Our free-flowing design provides ventilation to eliminate oil residue going into your turbocharger. This kit will prolong...