The FQ400 was originally designed to sit pretty near 500bhp crank but did not like the thought of going bankrupt under a mountain of potential warranty claims. So it was de-tuned, the turbo on was the best avialable at the time to produce over 400bhp crank with reliability. I agree it's a lag monster for 400.

Would be even more so with a GT42R on it

 

epic lawls at the GT42....

If you want a little more power than the FP Green with slightly more spool time, how about the FP Red or Black?