04-05 GM Duramax LLY GDP High Flow 3" Y Bridge and Cold Side Kit Finish:Raw Trucks with the Regular Production

Trucks with the Regular Production Option (RPO) "YF5" may require an aftermarket downpipe such as Diamond Eye 321055

Extend the life of your engine by ensuring every oil change is a complete one

Suggested option - BD Valve Body

Off-road and race use only

04-05 GM Duramax LLY GDP High Flow 3" Y Bridge and Cold Side Kit Finish:Raw Trucks with the Regular ProductionIncrease performance and flow with our upgraded 3 Inch Max Flow Bridge and Cold Side Kit. Our precision cast and CNC machined bridge section allows for maximum efficiency, as well as a perfect fit every time. Our two piece design allows for a much easier installation than the other kits on the market. (Black Powder Coat finish or Raw options)