Industrial Injection LLY Duramax Stock Long Block Engine (2004.5-2005) cat which can help optimize combustion

which can help optimize combustion and improve engine performance and fuel efficiency

EFR turbo Compressor Recirculation Valve disabling block-off plate

or Dorman manifolds do not work

Reliable stock replacement for 2004

increase horsepower potential

Industrial Injection LLY Duramax Stock Long Block Engine (2004.5-2005) cat which can help optimize combustionIndustrial Injection LLY Duramax Stock Long Block Engine (2004. 5 2005) Restore factory performance and reliability to your 2004. 52005 LLY Duramax 6. 6L with the Industrial Injection Stock Long Block Engine. Built to meet or exceed OE specifications, this complete long block is the ideal solution for customers looking for a dependable, cost effective replacement engine without sacrificing quality or durability. Every Industrial Injection long block