If you go to the heelclicker kit go to redline performance and not super torguer.Through redline you get a helix and better setup instructions than through super torquer and through super torquer you don't get a helix and the setup instructions are pretty blique I have the heelclicker kit in my sled and I couldn't get any settup help through super torquer they told me to call redline and red line said I needed a helix Which they provide in the kit if you get it from them but they wouldn't let me know what the angle was because this is their secret onless you buy the helix but this is comon with performance shops and clutch kits,as far as the BM kit the racers always say there is no magic in Black Magic parts, you could also go with D&D or speed werxs(they supplie the clutching,motors and pipes for Cats open sleds).