New from M4 Performance Exhaust is a universal header kit. High-quality 304 stainless steel. Detailed Specfications: Fits stock canister, M4 Slip-On's or any aftermarket slip-on. Saves 12 pounds over stock. Big time performance gains equal to or greater than other top exhaust brands. Features three scavenging equalizer tubes. Comes with 4x 18 mm O2 bungs and adapters to fit stock sensors.