Pypes Exhaust HDR55SK 05-10 Mustang GT Pypes Long Tube Headers With X-Pipe Brand New Pypes Exhaust Fits ALL 2005-2010 Mustang GT's both Coupe & Convertibles Headers are mandrel-bent 1-5/8" Polished T304 Stainless Steel tubing with 3/8" thick flanges Includes all hardware and gaskets Matching x-pipe is 2.5" tubing and is made from 16 gauge 409 Stainless Steel and will match up to your factory exhaust