This week I finally ordered the Perrin Performance shift knob for the WRX 5-speed. I know it fits my car as my car's thread size is the same as the old WRX 5-speed (12mm x6.25mm thread) and it has the same shift boot. Next week I'm getting the the Aero bars for my roof so I can eventually mount a plethora of accessories to it such as a Basket or snowboard rack. Eventually I will be adding Seat back protectors and side cargo nets to help keep the boot of my XV clean. I will be posting a how-to for the shift knob on here with pictures when it gets here via USPS. So as always check back soon as I will post more up.