Adjustable Actuator for Subaru Impreza Fitted with IHI VF48 Turbo. Whilst this actuator 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. Please Note: The pressure figures listed in the drop down menu above are minimum regulated pressure figures. If you are unsure please dont hesitate to call us on 01452380999. Diaphragm sealed internals are the default selection for this actuator product but customers now have the option of piston sealed internals. Unique to Forge Motorsport this innovation offers equal performance to the diaphragm type and low maintenance due to the hard wearing nature of piston sealed valve internals. Forge Motorsport nor any of it’s authorised distributors can assume any responsibility for any adverse effects resulting from the installation and tuning of this product onto a vehicle whose engine-management-system, whether factory or aftermarket, is not capable of allowing for the desired level of adjustment. While Forge Motorsport is happy to supply you with an actuator capable of holding boost beyond that of your factory unit we are in no way capable of knowing nor suggesting that your vehicle's engine or related systems are capable of supporting or surviving the stresses of such elevated boost pressure. In The Box: 1 x FMAC7SUB Actuator 1 x Forge Sticker This actuator is built with a Green coded spring as standard. If you require the FMPACTUN spring tuning kit seen in the associated products below, you will need to select the Piston option. All Forge Motorsport actuators are hand polished and made in the UK.