hey mate im running a twin gt 3037s on a rb 30/25 combo ,still sorting a few things out ,but i made 710 rwhp on 23 psi ,it cost a shitloads .i built this in mind to put a auto behind it ,but havent got around to do it yet ,after going about this ,i wouldnt put these on for a every day drive car ,all though you can drive it every day ,its just frys the wheels every gear untill your in 4 th and 5 th