Kooks Custom Headers - 2005-2007 (LS2) 2008-2010 (LS3) C6 Corvette - Complete System for C6 Corvettes 2005-2008 Corvette C6 Complete Header System. Uses part numbers #6600-EX and 6608S. With High Flow Race Cats. Made in 304 Grade Stainless Steel and comes with a life-time warrantee. Tube 1 3/4" Coll 3" Inlet 3" Outlet 2 1/2" OEM 2005-2007 (LS2) 2008-2010 (LS3) C6 CORVETTE Unit System