Had a race awhile back against an Evo MR. Guy said he had test pipes and that was it.
I have a "stage 2" 03 wrx (jdm headers, full jdm exhaust, no tune hence the quotes).
Neither of us launched at the start but I got a slight jump and was half a car length ahead by end of 1st. By end of 2nd, he was side by side with me and pulling. End of 3rd he was 1-1.5 car lengths ahead. End of 4th he was 2.5-3 car lengths ahead and we both shut down.
vf43 turbo going in soon, I can't wait