Custom DIY header exhaust kit for use on Briggs & Stratton Flathead Intek 5-6.5 hp engines that use 1/4" exhaust studs spaced 1 9/16" center to center. Made with pride in Colorado, U.S.A. Kit includes mandrel bent 90 degree 1" tube with 3" radius, CNC cut 1/4" thick flange, and stainless steel replacement mounting hardware. THIS KIT REQUIRES WELDING. If you do not have access to a welder most muffler shops are able to do this for you. MAKE SURE TO VERIFY THE CENTER TO CENTER BOLT SPACING ON YOUR ENGINE IS 1 9/16" FOR PROPER FITMENT. Great start for those that want to weld their own exhaust system for generators, go karts, mini bikes, or?