The perfect way to complement all the upgrades to your diesel truck's exhaust system is with a Sinister Diesel exhaust tip. Because this Sinister Diesel AR-15 exhaust tip has a universal fit, it will work with any Duramax, Cummins, or PowerStroke setup, giving your truck a far more aggressive look., Just like you'd guess from the name, the design of this Sinister Diesel exhaust tip has been inspired by the famous AR-15 rifle proudly used by law enforcement and the U.S. military for some time. It has the look of a quad-rail hand guard. The CNC-precision machined stainless steel features a black powder coat finish, perfectly complimenting other blacked-out upgrades. A 4-inch inlet and 5-inch outlet are included., U.S. Patent Pending, Features and Benefits:Construction - Stainless Steel, Product Design - CNC precision machined rails and ring