Fitting without any modification to the EJ20/25 engine of the Subaru Impreza WRX / STI, this Turbosmart Dual Port dump valve features a hybrid structure with an internal piston adjustable in stiffness, operating quietly on low boost, avoiding unwanted attention, but vents to atmosphere on high boost in order to enjoy the blow-off valve sound. Offering reliability and responsiveness at any level of preparation, this high performance dump valve will bring a clear improvement in terms of response time, but also an aggressive dumping sound under full load and comfortable at low rpm !

-

Direct mounting

Dual port structure 50% recirculation and 50% open

Adjustable internal piston

Aggressive sound

High quality aluminium structure

Black anodised finish

Install instructions included

Mounting kit included

Made in Australia