Pre-Order Komodo Dragon drop in conversion piston 372xp to 390xpThis is the redesigned, badass replacement for the miserable failure of a piston, The Chameleon. With help from others, Mark created this to actually allow the use of a 372xp crankcase and bottom end with a 390xp cylinder. There is of course fitment work to be done to allow everything to bolt up properly and any porting work you wish to do is up to you, but this is the solution to the "86er" as he calls it. Check out his videos on the origin of this