Check this place out http://www.alkycontrol.com/ then call and speak with Julio. i have seen a 30PSI (spike) and held 27 PSI the full 1/4 on 93 Octane and M1 on my car. Plus this guy will hold your hand and walk you through the whole set up.
Yep I heard great support from Julio esp for the GN's & T-Type Regal crowd.
