M2 Performance Acura RSX Type-S 2002-2006 Stainless Steel Header Replace stock restrictive headers and increase horsepower and torque. Made of High Quality Stainless Steel Material. Inlet: 1.75" Outlet: 2.75", TIG Welded CNC Machine Flange Professional Installation is Highly Recommended (No Instruction is Included) Vehicle Application:Acura 2002 2003 2004 2005 2006 RSX Type-S