I bought these from the guy that made them, back when I had a supercharged miata that I was going to road race. Keeps the belt in the proper location, no lips, so they won't throw a belt. Convex keeps the belt tracked in the middle. Bearings are replaceable, and I have about 5? sets of replacement bearings.

Paid $300, sell 200 or offers.

Gerry

this was for a 1.6/1.8 JRSC, but does that matter? Shouldn't any supercharger like this? I don't know, I am not mechanically inclined.