1998-2004 Mustang V6 Pypes Dual Pipe Exhaust w/Tips, Mufflers & X-Pipe - Off Road For use on 1998-2004 Ford Mustangs with a V6 3.8L engine For off-road use only; Catalytic converters not included Includes mufflers, x-pipe, tailpipes, 3" tips, clamps, hangers, hangers, hardware, & instructions X-pipe system comes with four O2 sensor holes, threaded Manufactured by Pypes Exhaust and covered under lifetime warranty