2003-2004 Cummins 5.9L 4" Turbo Back Single Exhaust No Muffler (411031 / 412031) 2013 - 2018 Dodge Exterior

2003-2004 Cummins 5.9L 4" Turbo Back Single Exhaust No Muffler (411031 / 412031) 2013 - 2018 Dodge Exterior2003 2004 Cummins 5. 9L 4" Turbo Back Single Exhaust No Muffler (411031 412031) 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!

1999-2002 Cummins 5

4L 4" Downpipe Back Exhaust w/ Muffler (421006)

We get a lot of questions about what is better about our KC 6

These exhaust systems are available in a 16 gauge aluminized steel or T409 Stainless

engineered for reliable sealing under high boost and extreme horsepower

IMPORTANT: The factory downpipe (2001-2004 LB7 only) does not fit aftermarket manifolds and up-pipes

Designed for 2001-2004 Duramax LB7 diesel engines

7L Dynomite Diesel Reman 30% Over Injectors (DDPFD6715-75)

Perfect for High-Power Builds

5L has an inherent design flaw where not all of the OE stud locations are utilized by the OE manufacturer which leads to warped exhaust manifolds

5 Hole Nozzle with 2 Pilots

ARP2000 is an alloy steel that can be safely heat treated to a higher level