here's my thought, I have a SFP mani with external wastegate(turbonetics 38mm with dump tube), a garrett 57 trim-.63 AR-fully spooled around 3800rpms and flows best around 22psi and up(oil only, stainless steel braided oil line), 3" o2 section, with low miles that I'm thinking about parting with it because a car called EVO is in my near future-lol. Damn trying to cap the water lines and in my opinion you'll be somewhat scared(all mental)to push your turbo to it's full potential.