This product is built with a predetermined actuator spring suitable for at, or slightly above factory boost levels. The actuator can be assembled with a stiffer spring upon request. Please contact us directly concerning this process It is designed and built with the intention of increasing the boost output of a turbocharged system. We cannot guarantee compatibility with all applications, nor the ability to increase the boost output beyond a level that is within the parameters set by the engine-management-system of the given vehicle at the time of installation, whether that system is factory or aftermarket for Mitsubishi Lancer Evolution IX

- Select your actuator spring rate -

Adjustable actuator springs (OEM / 18PSI / 20PSI)

Assembled actuator kit

Polished finish

Made in UK