Well for the people who said to pop the hood, it ONLY happens when i rev it that high whileim driving and i'm going to have to say usually in 1st and 2nd gear.

I'll check for exhaust leak i suppose.

and i'm definately sure its not a turbo, because i ran high 16's low 17's at the track rofl.



Oh and thanks a whole bunch for those who replied =D.