God point Wullie (and to blow my own trumpet, i do have the quickest EP in /scotland over the standing 1/4 ) See here
My own 250 hp GT up against an R32 GTR, certainly had a full exhaust and filter, unsure on much else. Now for you members who cant see past Toyotas, look how the GTR starts passing me just on the finish line, thats torque and capacity of the bigger motor. Yes up to a certain speed its evens stevens, but after around 100 mph plus it will walk away.