GrimmSpeed- Subaru 04-08 Forester XT / 06-07 WRX / 04-07 STi - Boost Control Solenoid subaru-forester-2011 This assures that we can

This assures that we can offer you the most precise and best fitting Radiator Shroud on the market

(3) Nylon washers

showing a 10°F temperature drop as well as a +5 whp and +7 wtq bolt-on power increase for our stock test vehicle

Compressor wheel inducer: 52

GrimmSpeed- Subaru 04-08 Forester XT / 06-07 WRX / 04-07 STi - Boost Control Solenoid subaru-forester-2011 This assures that we canThe GrimmSpeed Electronic Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will not reduce the life of your factory computer because it is designed to draw the same amount of power as the factory BCS but flows better and reacts faster. It plugs in and requires no splicing or soldering of resistors. With the included bracket you can bolt it in, plug in the connector, and start tuning for fast boost response,