Have to agree with chip mate, as much as i love rst's you don't really stand any chance if the cossie IS 550bhp! A 300bhp rst is a bloody fast car don't get me wrong but a 550bhp cossie is a very very quick car in reality, as said there are certain circumstances where you won't get embarrassed at all but the sort of race you'll prolly have down a duel carriageway or somethin there will be only one outcome sadly....