2007-2012 Cummins 6.7L 4" Cat & DPF Race Pipe No Muffler (411022 / 412022)2007 2012 Cummins 6. 7L 4" Cat & DPF Race Pipe No Muffler (411022 412022) 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!

just the sophisticated AI will learn the settings for your particular application from your throttle inputs

Garrett is one of the world's leading pioneers of turbo technology

Why Choose Our Competition Springs

A notched wire is not only noticeable

High RPM Capability: Engineered for stable valve control up to 6

Available in 3"

The first and only intake manifold mounted grid heater that meets the Cummins spec for heating element support

and a much larger and stronger

Superior Strength & Durability: Robust materials and expert craftsmanship ensure long-lasting performance under extreme conditions

It features CNC-machined Aluminum and stainless Steel Components to ensure a precise fit that's guaranteed to last

Other upgrade kit designs change the geometry of the steering which can sacrifice safety and drivability for straight line strength while pulling or racing

1999-2007 Duramax Mean Green High Output Alternator (MG8247)