gt's run what? 14's ? A WRX on 21psi with supporting mods would be running mid- high 12's. Then again, I don't know how his stock WRX turbo is even pushing 21psi unless the WRX has a bigger turbo, which would make this story even less believable. The WRX turbo is pretty much maxed out at 18psi , at 21 psi it would just be very in efficient and be burning up. Anything can happen on the street so good kill, but it sounds like you beat the driver or something is missing from the story.