2020-2022 Powerstroke 6.7L 4" Cat & DPF Race Pipe No Muffler (421027)2020 2022 Powerstroke 4" Cat & DPF Race Pipe No Muffler (421027) 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!

stiffer spring pressures

6L Duramax LB7/LLY/LBZ/LMM/LML engines

020″ piston protrusion and at least

extending filter and oil life

Hot Retorque: After reaching operating temperature

2017-2020 Duramax L5P 70 Degree Vented Turn Out Exhaust Tip (ST11070B)

MAHLE Original Pistons are built to stringent specifications and feature an OE quality construction with the same great OE features

2011-2016 Duramax LML Dynomite Diesel Reman Injector 30% Over (DDPLML-75)

5" Downpipe (L5P-EXH-A004)

High rpm amplifies the impact of the camshaft to the tappet which can break through the oil film above 4

oversized injection lines

This turbo works great on stock injectors