Kooks long-tube stainless steel headers and OEM-catted X-pipe for 2005–2010 Ford Mustang GT with manual transmission include 1-5/8 in primaries stepping to 2-1/2 in and a 2-1/2 x 2-1/2 in OEM catted X-pipe. Made in the USA from T304 stainless steel, these components are dyno- and race-tested and backed by Kooks' limited lifetime warranty. Standard race cats are noted as not for use in forced-induction applications.
Kooks 05-10 Ford Mustang GT Manual 1 5/8in x 2 1/2in SS Long Tube Headers and OEM Catted SS X Pipe