Industrial Injection 2004.5-2005 LLY Duramax Ported & Polished Cylinder Heads (RH & LH Set)2004. 5 2005 LLY Duramax Ported & Polished Cylinder Heads (RH & LH Set) Unlock the full performance potential of your 2004. 52005 LLY Duramax 6. 6L with these Industrial Injection Ported & Polished Cylinder Heads. Designed for high performance applications, these fully CNC ported heads deliver increased airflow, and enhanced power capability for racers, sled pullers, and serious diesel enthusiasts. Machined using Industrial Injection's state of the

and top hat valve seals

7 Cummins Premium Stock Plus Short Block Engine (2007

this cylinder head design has supported over 4

high-quality products that stand the test of time

Each head is assembled with custom stainless steel nitride-coated valves

enhance combustion

Includes one stock Reman 6

improving drivability in performance applications

Rebuilt DS 6

ARP main bolts installed

BorgWarner Angled Port CRV Cover

- Allows For Proper Tube to Injector Seating