Product Details: Your turbocharged street beast demands a higher level of boost and thus a PERRIN™ Performance manual boost controller is in order! Adds horsepower and torque while achieving a perfect balance of response and boost level. Combined in a “twist-to-adjust” package that incorporates a custom wound internal progressive rate spring and ceramic metering ball for boost management. Applicable to all turbo charged applications.

Fits: Dodge SRT-4, Mazda Mazdaspeed Protege, Mitsubishi Lancer Evolution, Subaru Forester, Subaru Legacy GT, Subaru STI, Subaru WRX, Subaru Impreza non-turbo, Universal