From Sinister Manufacturing comes this great exhaust tip for your diesel truck that looks all business! US combat troops have trusted the AR-15 assault rifle for decades, and these exhaust tips replicate the AR-15's quad-rail hand guard. These tips have a 4-inch inlet and 5-inch outlet. This tip is crafted from powder coated stainless steel and features a dual wall design to shed heat. A stylish new addition to the tail end of any diesel truck, like the Ford Super Duty, Ford Excursion, Dodge Ram Cummins, or Chevy Silverado/GMC Sierra! Universal fit exhaust tip installs easily on your exhaust with basic hand tools.