We suggest a GrimmSpeed EBCS as one of your first mods on your Evolution 10. It is not only one of the easiest to install (no cutting or splicing) but also one of the most beneficial - absolutely needed prior to tuning. These high quality 3-port solenoids out class the competition and are the only true direct fit Evo X Electronic Boost Control Solenoid on the market today!
The GrimmSpeed BCS 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, increased boost pressure and free up lots of power. Planning on returning the car to stock? Just reverse installation.