i work at a field in Texas, and ive installed 2 hot rod kits for guys in our pro shop, and ive tested both, and i think that for the price ($35) that its really not a bad deal. You get the longer guard spring, the speed wheel, the cone, all necessary parts, the rip drive wheel, and its all ano'd aluminum.
functionally, it works a little better than standard rip drive equipment IMHO, but there again, some people who have had a bad experience with them will say just the opposite. back-loading the cone spring can be annoying, but its a neat kit and i think it works well and makes halos look nicer.
black sparkle halo w/ black hot rod parts kit FTW