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I have a full pi swap, 75mm tb/plenum, underdrive pullies, catted h pipe and flowmaster catback. I ended up with 230 rwhp and 290 rwtq. Im happy with the torque especially since i got all of it by 3500 rpms but am dissapointed by the hp. The car seems to give out at 4500.
If its not that only things i could think of are cam timing is off or shitty tune. Having the cam timing off ca cost you up to 20hp or more if its really bad. i mean there are alot of small things can make it happen.