2004.5-2007 Cummins 4" SS Turbo Back Exhaust System - No Muffler (DDC-4D05)

Note: Fits all wheelbases and cab configurations unless otherwise specified. This is a straight-pipe system with no muffler and is designed for race applications. Designed for competition/race use only.

The DDC-4D05 is a 4" Turbo-Back Exhaust system for the 2004.5-2007 Cummins 5.9L. It replaces your restrictive OE exhaust system with a 4" mandrel-bent straight pipe exhaust system. Just like all of our kits, it will come with the required clamps, pre-weld contour bent hangers, and stronger flanges to help you sail through the installation process. This exhaust not only sounds great but will improve your torque, fuel mileage, and throttle response while lowering EGTs!

Why Shop Dirty Exhausts?
When you buy from Dirty Diesel, you’re buying peace of mind. We’ve put in the work to bring you exhaust systems and components that meet our strict standards for durability and flow. Every item is vetted for quality and long-term performance, ensuring you get professional-grade hardware without the headache of poor fitment or subpar materials.

Part Number: DDC-4D05