damn, wish I could be pullin 12's w/ just BPU mods on my VR4, but then again I guess it all comes to driving skill, 'cause i've heard anything from high 12's to low 13's w/ the mods i'm doin which are pretty much similar except for the fact that my car comes stock w/ smaller turbos, smaller injectors, and smaller fuel pump then MKIV, so technically a turbo upgrade, injectors, fuel pump, and a piggy-back ECU device for fuel management would be what would put me at the equivalent of a BPU Supra and ultimately 11's.
BTW love the board name, pretty much carbon-copy of mine on 3si.... VR4 Playa(didn't wanna use it on this one 'cause i'm not really a playa and thus don't want "guff" bout my board name, i'm just a huge gearhead, well i'm a ton of things but don't wanna get into that, all i know is i'm not a playa

)