I wanted to get a new clutcy and I wanted to get some more acceleration too. I know that will a more shoed clutch you gain acceleration. I found this 4 shoes clutch kit but its for a .21 Will this fit on a .18 or is there a big difference?

Thanks
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXD218&P=7]4 Shoes Clutch Kit[/link]