I had seen a while ago a plastic 'neck' that removes the resonator in the passenger-side fender. I would like to keep the Cold/pseudo-ram air intake on my STi and would like to hear a bit more from my turbo and improve response.

 

I bought the Godspeed downpipe for mine among other pieces. The downpipe makes the turbo very "hearable"? Anytime you gas it, you can hear it....even just backing hte car up in a parking spot....