Mods on the EVO from what I could see and hear were...
exhaust (probably catless because I saw him shoot a flame from it)
HKS BOV I think. (that sound is really easy to pick up on)
Profec B boost controller.
My mods... 2004 WRX
Well I pull up next to him as the light was turning green and he see's me and stomps on the gas, I wasnt sure if I was going to play yet but I figured hey what the hell. I hit the gas and catch back up to him, we both hit the gas and in second he pulls about car length or so ahead and I hit 3rd and start pulling him hard and I get about a car and a half or so on him and hit the brakes and he cruises past me and this is when I see the flame shoot from his exhaust, kinda cool. Didnt get a chance to talk to the guy. he turned off pretty quickly. The funny thing is I think he thought he was going to walk me pretty hard and then all the sudden im passing him. I would have liked to go at it again on a more straight road, when I let up on the gas I was going into a very slight turn in the road. I think I would have pulled a little more on him if I would have had a little more space. Overall seemed like a cool guy he was with his girlfriend I think, so maybe she told him to stop.
Finally a little redemption for having my ass handed to me on a platter by the blown c5