My NMS head gave me 210bhp @ 11psi @6000rpm with power still climbing, compared to 210bhp at 17psi i was running before. On the same day as i did the 210 11psi run, another engine i'd built with a std head running 18psi did 200bhp. The gains only get bigger when you increase the boost. It also lowered my boost threshold by nearly 500rpm.

Rick.