An important part of getting the most power out of the EJ255 in the Forester STI is improving exhaust flow. The factory catalytic converter (cat) is quite a restriction on flow and it being right at the outlet of the turbo will really reduce the speed the exhaust gas can flow through the exhaust turbine […]
The factory inlet to the air box draws air from just behind the headlight down into a Y piece with a large air box underneath then back up into the filter box. The STI fog light covers have a useful grille section on them though that I thought could be used as a nice cold […]
(First posted on MLR forum in June 2014) R-spec 3 port solenoid fitted. (wiring not connected yet as I will wait until it’s being mapped) Next. New genuine Thermostat and Forge actuator. (new stat purely cos the original is quite old and they can get sluggish or fail when they’re old. So for the […]