My buddy has an 05 evo and just picked up some Brian Crower titanium valves, springs & retainers, and ARP head studs. How much boost should it handle over stock now? I'm pretty new to the evo 4g63, so is he. Just trying to see what would be optimal to tune with and would like to know what this thing should handle now.
He also tossed in some Brian Crower 272s and some adjustable cam gears as well if that plays a roll.