2001-2016 6.6L Duramax Replacement Up-Pipe (Passenger Side) for OEM Exhaust Manifold Fed (116120010)Description Diesel engines (even stock) produce high temperatures and pressures. OEM up pipes eventually fail from constant temperature and pressure fluctuation. These PPE up pipes are designed and manufactured as replacement up pipes for PPE High Flow up pipe kits All PPE OEM Up Pipes create a 53 percent greater flow than stock. The PPE OEM Up Pipes is a direct bolt on to your factory manifolds. Unlike factory parts, PPE OEM Up Pipes are manufactured