youll need to extensivley mod that vitos kit and then cut the head replace the scrap piston get vforce reeds new gaskets new manifold for a bigger carb and a host of other issues to comptete with this kit .sure its possible to break 40 true rear wheel hp but your looking at a peak numbers not the potential curve (thats what wins races) and dynos are jsut a tool they can be maniplutaed they vary from shop to shop and bike to bike day to day in the real world that means nothing.basicly the kit is 932 $ from la sleeve you get al lthe goodies youl l want and need besides the carb itslef theres a giant a 250r intake box * triple exhaust thats much better designed than vitos ,you get huge boysen ports in that intake like on a 250r yo u get the extra crankcase volume more transfer area bigger exhuast tract and sub ports better thicker sleeve more cooling cpacity /fins yo uget a new manifold a new 250r reed cage with carbon reeds a head already race cut and desigend for best results you get the best quality gaskets bearings and custo m made forged piston ,its top notch stuff and has alot of R&D involved and after porting it really comes alive