My car made 515.4bhp on the dyno and made 395bhp @ wheels at AVA . BUT, it was on a restrictive 3" exhaust, an inadequate intercooler (ACTs in excess of 55°C) and had mega tall gearing meaning 4th gear at 8k = 168mph. ALL of which has huge effects on the at wheel figures (ESPECIALLY the gearing) compared to a car properly set up (which mine now is). Obviously I didn't know what I know now then .

I bet if I went back with the same engine, knowing what I know now, it would make 440bhp @ wheels NO bother and even more with standard gearing .