4" Cat & DPF Race Pipes With Muffler | 2015.5-2016 GM 2500/3500 6.6L DURAMAX- 431030 Oil Pump Kits " This is direct from Holset

This is direct from Holset OEM VGT (Variable Geometry Technology) Turbocharger

Turnbuckle for precise boost pressure settings

CORE CHARGE OF $900

HD polyurethane bushing with steel sleeve for connection to axle

4" Cat & DPF Race Pipes With Muffler | 2015.5-2016 GM 2500/3500 6.6L DURAMAX- 431030 Oil Pump Kits " This is direct from HolsetConstructed 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 OEM Style 3 Bolt Flange No