I M8 that I have now had them installed at the dealer when they put a low elevation clutch kit in it. It has 1200 miles now and they look mint still. I would only do it if your current rollers need replacement though don't think it makes any performance changes...
get the high temp rollers from cat instead of the rock rollers. Ive seen the rock rollers crack due to being too hard. High temp rollers are much better.
