My intercooler piping is from 2" to 2.5" before reaching the throttle body. I was being told that if the intercooler piping and intercooler is too big, it'll contribute to more lag.
Sweet. Now I just need to figure out how to mount a Stock Evo BOV to a intercooler pipe that has a 38mm flange for an aftermarket valve. Not sure if they sell adaptors.