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. ย ย (wiring not connected yet as I will wait until it’s being mapped) Next. ย 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 […]