American Racing: 2007-2013 GM Truck Full Size 6.0L 2500HD Long System Headers Cats:With Cats exhibited no hot or cold

exhibited no hot or cold start issues

All necessary hardware /

Increased Air Flow = +23%

Horsepower = +13

Widths – 4

American Racing: 2007-2013 GM Truck Full Size 6.0L 2500HD Long System Headers Cats:With Cats exhibited no hot or coldAmerican Racing Headers: 2007 2013 GM Truck Full Size 6. 0L 2500HD. Long System 1 3 4" x 3" or 1 7 8" x 3" Systems are available for all 2WD 4WD trucks. Guaranteed to deliver outstanding performance while providing a fit and finish that simply cant be beat, this could be the single best upgrade for your GM truck. This system fits 6. 0L 2500 HD 2007 2018 Models. Product features on this system includes: 100% Made in the USA Never Outsourced Made