I have seen three gr/gv running 65c wo issues. Maybe just a model difference.
I would suggest aem cai as well. We did a few runs to test stock intake vs aem ar evor. Stock intake produces 5kpa more vacumn (restrictions) than aem. And u have to love that noise
Imo, Std coilover is best bang for ur bucks, so is project mu pada (hd front, b spec rear) plus goodridge ss brake line. Roughly around $2100, it will improve ur cars handling significantly.
using the Perth-WRX mobile app