U only go for aftermarket if u wanna adjustability and running high boost, but that money can be put at better place. And hks would be best for u.

using the Perth-WRX mobile app

__________________
MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport