4" Cat & DPF Race Pipe With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX- 431029 FLEECE PERFORMANCE " 2X - 10233: ARP Rocker

2X - 10233: ARP Rocker Shaft Bolt Kit

along with cast in fins and increased oil capacity

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

Silicone Box Plug removed:This configuration will provide an extra air inlet that will be pulled from the passenger side fender area

Dyno-Proven Gains up to +10 HP and +19 Lbs

4" Cat & DPF Race Pipe With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX- 431029 FLEECE PERFORMANCE " 2X - 10233: ARP RockerConstructed 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