Well, Like I said in my other posts, I want to make at least 800rwhp and have the turbo easily capable of making a bit more. I read that the sp74 starts spooling around 3400rpm with a nice open exhuast. Is the turbo a BB? And the Sp73 says somewher elik 870rwhp max, is the spool on this better since its a bit smaller? It is smaller right? Ayiyaya... supras and there single turbos.