http://www.amainhobbies.com/product_...5mm-Brass-21-2

With this collet, I didn't need any flywheel washers, just clutch bell washers. The b5 needed one more washer to keep the clutch bell from being sloppy as compared to my vspec. This is the same collet I used with my OS vspec because my v-spec didn't come with one. When I tried to use the b5 collet, my fly hit the carb. That's not to say you couldn't use the b5 collet with some flywheel shims. As noted, it's a fairly standard install procedure.