PPE 116120000 OEM Length Replacement Up-Pipes 01-04 6.6L GM Duramax 2021 Chevrolet 6.6L Duramax L5P Banks hot side has 103%

Banks hot side has 103% greater flow area than OEM hot side

Jacobs Exhaust Brake Compatibility: Choose the appropriate option if your truck is equipped with a Jacobs exhaust brake for proper clearance and fitment

you NEED to address your input shaft before catastrophe occurs

it will drastically hinder fuel flow

all without drilling a single hole

PPE 116120000 OEM Length Replacement Up-Pipes 01-04 6.6L GM Duramax 2021 Chevrolet 6.6L Duramax L5P Banks hot side has 103%PPE's replacement up pipes are designed to improve exhaust flow for quicker turbo response and lower EGT's coupled with a solid construction that will not fail. 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. PPE OEM Length Replacement Up Pipes are 50 State Emissions Legal (see notes below) and allow 53%