TurboSystems
http://www.hahnracecraft.com/index.htm
http://www.nlrsystems.com/
http://www.efrracing.com/
http://www.velocityracing.com/home.htm
I can't recommend Hahn or at least their system design,but the parts themselves are good quality.
Here is are some sites that have Turbo building info
http://pub31.ezboard.com/fazbiketechfrm9
http://www.turborick.com/main.html
Turbo System Parts
http://www.bellengineering.net/index.html
http://www.turboneticsinc.com/index.html
http://www.vecco.net/
Water Injection System
http://www.aquamist.co.uk/cp/cp.html
Alternative Performance Products (Shane Lowrance)
111 South Ridge Dr.
Cedar Creek, TX 78612
512-296-5735
slowrance@austin.rr.com