#14268, "RE: Does the HRC Stage II really pull high 13's with aftermarket exhaust and nothing else?" In response to In response to 20
ahh, I dont know about you edging out a new SS at 9psi, I have a hard time running a lot higher boost than that.. I raced a new z28 at 15psi and it was a good race, real close. Didnt ask if he had any mods, just assumed exhaust and maby an intake...