CastFlow Manifolds & Up Pipes 01-16 GM Duramax

This is the newest CastFlow series manifolds and 2" up pipes. Expect greater hp, quicker spool up, and lower egts with these. The standard sets comes WITHOUT an EGR provision, but you can add one below if needed.

*LMM trucks require a coolant line relocation fitting found in the LMM section. No gaskets included.

*2015's may need a small spot on the passengers side manifold ground for clearance.