Utilizing the patented CC Insert, these kits offer an alternative to a full exhaust system on Lake Style Headers. Each kit comes with 3 disks to fit the taper of the header cone. Featured picture is the 3.5" kit. Kits available for: stock or modified small block or big block applications. Also available with a triangular 3 bolt flange or a round 4 bolt flange, welded to the outlet disk for easy bolt-on installation to your header collector. THIS KIT REQUIRES WELDING. Applications available for: Lake headers by Gear Drive, Lime Fires by Sanderson, and Speedway Motors headers and kits. Installation instructions: See Tech Info.