ebay: mx5 alloy underdrive pulley 10kw gain?
Posted: Sat Apr 15, 2006 2:59 pm
I've thought about getting something like that myself from time to time over the years, in theory theu should provide a gain but some ppl tend to tell you to stay away from them.
Probably the best-argued reason for not getting these was this:
http://www.dinancars.com/whitepapersFile.asp?ID=5