11-16 GM 6.6L Duramax 2500HD / 3500HD 50 States LEGAL OEM Length High Flow Up-Pipes 116121115

50 States Legal, CARB EO# D-701-33

Diesel engines (even stock) produce high temperatures and pressures. OEM up-pipes eventually fail from constant temperature and pressure fluctuation. 

PPE has taken OEM replacement to a new level. All PPE OEM Up-Pipes allow 53% greater flow than stock. PPE OEM Up-Pipes are a direct bolt-on to your factory manifolds. Unlike factory parts, PPE OEM Up-Pipe are manufactured from 11-gauge 304 stainless steel and includes our superior PPE 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures.