4″ 2017-2019 Duramax L5P Cab & Chassis Downpipe Back Exhaust No Muffler-US STCOK

Looking to wake up your L5P? This a bolt-on 4″ downpipe-back exhaust system for your Cab & Chassis L5P that will replace the restrictive OEM exhaust system.It will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you sail through the installation process. Not only will this make your 6.6L sound great, but it will also increase airflow, MPG, and torque while lowering EGT’s!

Notes:

This system will ONLY fit Crew Cab, Cab & Chasis trucks with the OEM style 4-Bolt Flange off the turbo direct pipe & a center-mounted rear fuel tank！