Ok my friend is trying to build a 280 rwhp S4 turbo II, he says he can make it with rtek 1.7, 720 secondaries, an S5 turbo, a boost controller, and a turbo back exhaust.

now first thing first how much power can the STOCK S5 Turbo support?

and is his setup really gonna work, I just ordered my BNR stage 4 S5 turbo and I was just wondering if his turbo will work to support that much as easy as mine will?

thanks
marty