2017-2019 Duramax L5P Cab & Chassis Downpipe Back Exhaust No Muffler (431025)2017 2019 Duramax L5P Cab & Chassis Downpipe Back Exhaust No Muffler (431025) Constructed out of 16 gauge aluminized steel or T409 Stainless, this exhaust system is designed to simplify installation with included clamps, preweld contour bends and improved flanges. Enjoy a noticeable boost in performance, lowered EGTs and amplified air flow with this Mel's system. For powerhouse performance, Mel's delivers horsepower you can hear! IMPORTANT NOTE: These

make sure you set valve face at

reduced wear

Made from high-quality cast A356

When this is a new engine

trucker feel

7L 4" Turbo Back Single No Muffler (411014 / 412014)

Add another measure of protection and increase fluid flow with the easy-to-install billet aluminum PPE Transmission Fluid Thermal Bypass Valve for the GM L5P Duramax Diesel

Unlocking your T93 TCM allows you to tune and optimize your transmission

stamped metal pan with one that will help keep your transmission cool and protected

particularly those pushing beyond 800 HP

These fittings allow you to repair your stock breather system

Use a Radiused Cutter