CAI and exhaust are pretty good mods on a boosted car. My old numbers on a fresh engine at 10psi were 188hp. All I changed was the intake and exhaust, and got almost 20whp, 5 years later. Tell him to get that thing on the dyno. He probably doesnt even have an idea what it makes, you didnt know what the rsx would make.
500whp of spinnin fury!!!