Me and a friend did heads, cam, headers, blackwing and z06 mufflers in his 99 frc. Here are the before and after dyno pulls. He bought everything used and was told he should do around 420rwhp. We cam up pretty short. The cam is a comp cam .584 .595 232/232, with LSA of 113, heads are 5.3 heads ported and polished, slp headers, and h-pipe with the blackwing air intake. The car is a 6 speed with 19 inch wheels. It was 314 rwhp/322wrtq before and now 385 rwhp/372rwtq with a/f 13.1. Do those number sound right or does the car have a lot left in it and just needs to be tuned more? Can better tuning make up 25-35 rwhp. The car runs and drives great, it just has alot lower hp than expected. Is there anything I can log to see if I am over looking anything? Or should I just flash it back to stock and start over and install a wideband. We were using the wideband on the dyno.