This is a bolt on kit and the piston uses pump or race gas. We recommend that this be installed by a qualified mechanic with experience doing this type of work. The item "Blaster Big Bore Kit 68 mil Cylinder Head Complete Top End Rebuild Wiseco 573" is in sale since Friday, August 21, 2020.This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components". The seller is "bpracingatv" and is located in Upland, California. This item can be shipped worldwide.