Kooks Custom Headers - 2005-2007 (LS2) 2008-2010 (LS3) C6 Corvette 3" x 2 1/2" C6 Off Road X Pipe 3" x 2 1/2" C6 Off Road X Pipe, Must be used with Kooks Headers. (Corvette Bolt In 3 Pc X-crossover: Includes X-crossover, Mid Sections And Hardware) Coll 3" Inlet 3" Outlet 2 1/2" X Pipe OEM Connection Unit Each