Pro Fab Performance Cast Flow series Manifolds and 2" Stainless Steel up pipes for 2001-2016 Duramax. Passenger side up pipe is built symmetrical to the driver side and WILL NOT clear a conventional down pipe in single turbo applications. This kit is designed for use with Twin Turbo trucks or Hood Stack setups. If you have a Single Turbo's, you want to purchase the Standard Cast Flow Kit.
-LMM trucks require a coolant line relocation fitting.
-Gaskets sold separate
-2007.5-2010 LMM Requires Coolant Bypass/Relocation Fitting WCF100798
-2015+ require a small spot on the passengers side manifold ground for clearance to the frame
-No EGR Provisions, Competition Use Only