yes....I believe the rxt comes with a 15 tooth....you can get a 14 or 13 tooth from Eddie....now changing the clutcbell or spur gear for more acceleration will lower your top end speed....I honestly dont believe you will need to do either....but if your wanting more punch off the line, get some aluim clutch shoes....the ones Eddie has bite real good....and wont affect your top end....if that doesnt get what your looking for, only then would I drop a tooth or 2.....

and if you or anyone for that matter are looking for a way to hop up a sh.28 p3....here is a place to get the xtm sleeve http://www.hobbypeople.net/gallery/148435.asp ... and I VERY STRONGLY suggest that anyone that is wanting to do this mod should also purchase a wrist pin clip...if that lil sucker gets away from ya ur done...always good to have a spare if your taking the piston off the rod