Pypes Exhaust SFM52 1998-2004 Mustang V6 Header Back True Dual System For use on any 1998-2004 Ford Mustang with a 3.8 liter V6 engine Header-back exhaust system without cats: Off-road use only Includes x-pipe, mufflers, downpipes, hangers, clamps, hardware and instructions Gain 15-25 hp and much improved sound as close to V8 as you can get and cool looking functional dual tailpipes Made by Pypes Exhaust