MBRP GMS9401 4 Inch Front Exhaust Pipe With Flange For 01-04 2500/3500 Duramax XP Series

The fastest path from the turbo to the tip is through an MBRP front pipe. Bulking up exhaust flow. Get the most exhaust flow right from the turbo with our new down pipes. Replace your restrictive stock pipe with one of our mandrel bent 16 gauge pipes. Protected by our tough high temperature coating; these pipes deepen your diesels sound while lowering EGTs and providing quicker throttle response.