Just my .02, but an STi isn't even designed to be a 1/4 mile or straight line car... doesn't matter if you can keep up/beat or follow an STi; because when you get close to it, it will just do a 90 mph 4 wheel drift and own you that way. Just build your car to, um I don't know... have fun... and let the WRX be on it's happy little way.