4" Cat & DPF Race Pipe With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX- 431029 FLEECE PERFORMANCE " 590 CFM Rating @ 7"

590 CFM Rating @ 7" H2O

Part Number: 247-4208

Designed for both style and comfort

2X - 10233: ARP Rocker Shaft Bolt Kit

It is the largest sizing that we make but we can make more or less fuel delivery within this largest group

4" Cat & DPF Race Pipe With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX- 431029 FLEECE PERFORMANCE " 590 CFM Rating @ 7"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! Features: Ease of installation Contour Bent Hangers TorcTite Clamps No Bungs Fits Cab Box