2011-2019 Powerstroke Cab & Chassis 4" Downpipe Back Exhaust w/ Muffler (421016)2011 2019 Powerstroke Cab & Chassis 4" Downpipe Back Exhaust w Muffler (421016) 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!

2001-2024 Duramax PPE High-Flow Exhaust Manifold & Up-Pipe Kit (116111035)

Trucks that run in warmer climates

thicker hub

pre-welded contour bent hangers and improved flanges

7L SOTF Switch (FTFORDU)

This improvement is the result of substantially stronger steel

7L Cab & Chassis Air-Boss 67 Grid Heater Delete (07510-ABIP-CC)

EGT's running too high

more stable valvetrain operation

2003-2018 Cummins 6

Make a statement

Maximum size nozzle recommended for stock turbo