Big power Parmakit for 103/rcx/spx/105/Fox. If you can't be convinced that 50cc is the French way to go, try this one. Aluminum cylinder with huge transfers and a piston that is littered with holes. This is not the kit for beginners. Comes with a very nice head that has no decomp! Pair this with our Parmakit cases. Would also go well with the Malossi cases. This kit is not for the uninitiated but is sure is sweet!