high quality universal adjustable in-line manual boost controller is an excellent choice if you are wanting to increase your boost pressure. 

Fitment: Universal for turbocharged vehicles.

For Subaru WRX Legacy Forester Mitsubishi EVO X 02-15  

Also Could fit For other  Turbocharge Vehicles

Ball and spring design.

Billet Aluminium body, with anodized finish.

Tool free, high grip adjustment.

Easy adjustment and then lock the position.

Professional installation is highly recommended and should always be set-up with a boost gauge to monitor your boost levels. You could damage your turbo or other engine components if used incorrectly. No fitting instructions are included.