I'll play.
June 2011 (GT30) - 403bhp.
Would have made a lot more but we didn't know we were breaking valves due to a cam fuckup whilst mapping...
Sept 2011: (GT28) - 338bhp.
Outflowing the GT28 at the top end so boost trails off. Graph shows 2871 would be more suited at this point, but still made 330+bhp @ 18psi. But look at that torque curve. About as perfect as they come...