This split rear bolt-on cat-back exhaust looks good and has a very aggressive sound. Has a typical gain of 15-20 horsepower with the mandrel-bent tubing, which maintains constant exhaust flow. Comes with zinc plated, factory style hangers and heavy duty clamps. Not recommended for towing, because carbon monoxide may be drawn into the interior rear of a vehicle when the exhaust pipe directly exits to there rear. Designed for Ford F150, stand/extended cabs, short/long beds with 2/4-wheel drive.