bah... it all depends on the build-up and tuning. My friend had a tuned Z6 slightly built internals with turbo running 18 psi against a B16A2 stock internals turbo with FMU. My friend whooped the shit out of this B16A2 turbo. Both coupes.
On the other hand. I know somebody locally pushing 611whp on a built B16A2 turbo.
Really, it all depends on the efficiency and harmony of each mods/upgrade/build/management.... peace!
