I bought a Spearco kit about 4 years ago and it cost me $820. I know Eastern Performance sells the kit and you can buy it directly from Spearco also. Now that I think about it Turbonetics should have the kit too. Don't have the #s for any of them but there are plenty of people that do. The Spearco will add an easy 100hp according to my trap speeds before and after. The TM setup should offer even more but it costs more. Sorry I can't help more but there a a lot of people on here with both setups that can help.