We all know he doesn't have 350hp, just saying that there's multiple people out there with 300rwhp NA, which equates to over 350hp at the crank.
I've not seen the wheel bhp over 300 - it would mean making more than 50bhp on the uprev with mods, mine had HFCs, exhaust, stillen intake, spacer etc and gained 21bhp. I guess if you make some huge changes costing thousands you might get to 350, but not whats on Payco's car at the moment?