Check the listing for details. BRIGGS & STRATTON 5 - 6.5 HP DIY CUSTOM EXHAUST KIT GENERATOR GO KART MINIBIKE. Condition: New. Listed at 22.50 USD. Custom DIY exhaust header kit for use on Briggs & Stratton 5-6.5 HP engines that use 1/4" exhaust studs spaced 1 9/16" center to center. Great start for those that want to construct their own exhaust system for generators, go karts, mini bikes, or? 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. I also offer a fully welded stub header and header kits for other Predator, Honda, and Tecumseh engines in my Ebay store. Check my feedback and see what my customers have to say about my products and buy with confidence!