Modern Horsepowers SS Full 3" C63 AMG Catback Exhaust with X-Pipe MHPs C63 AMG catback features fully mandrel bent 3" 304 Stainless Steel with 316 Argon backburged TIG welds. Catbacks mate to either the OEM exhaust at the factory mounting point (factory resonator) or to the MHP Longtube Headers with 3" Mids using adaptor stubs for the ultimate in system modularity. There two choices of muffle: straight through for pure race and all out performance applications or a quieter baffled option for those wanting less overall exhaust noise. No cutting or welding of the OEM or this exhaust is required for install. Install/removal is extremely easy and can be done by even the most novice of mechanics. All of MHPs exhausts are 100% Drone Free and designed for maximum performance using the highest quality materials, design fabricators, and welders. All MHP header and/or catback exhaust systems come with a lifetime warranty on All materials and workmanship.