even with cams and a pistons upped to 10.5 vs 10.3, ive only seen mid high 280wheel. you would have to get some serrious cams and 11.0 + to get over 300whp... its kinda the holy grail mark of the DE motors.
are you serious? a stock g35 03 makes 280hp. you can easly get 300hp with bolt on's. intake, exhaust, headers, cams, etc. my friend made over 300hp with just all the basic bolt on's inc cams and pistons on his 350z tuned