2004.5-2007 Cummins 5.9L 5" Turbo Back Single No Muffler (511015 / 512013)2004. 5 2007 Cummins 5. 9L 5" Turbo Back Single No Muffler (511015 512013) 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!

Two screws are 5 mm longer to accommodate the downpipe mounting bracket

Duramax 01-04 LB7 Injector Set: Remanufactured injector set at 25 percent over

Our part number for the upgraded fuel pin is: DDP PIN

0L Powerstroke Super Duty takes our popular "Standard" Regulated Return Kit to a new level

Mahle Original head gasket sets give you original equipment form

Surface Flatness

this kit improves airflow and reduces unnecessary restrictions

7L 5" Downpipe Back Exhaust w/ Muffler (521034)

High Lift Compatibility: Engineered for up to

Requires PCM to be shipped to PML Parts for the unlock

MAHLE 224-3708WR Piston With Rings (Standard

Upgrade to our Bolt-On Cam Gear Retainer and safeguard your mechanically injected Cummins against cam gear push-off