NEW LOWER PRICE WAS $250 now $229.99 Inefficient factory blow off valves (BOV) can hinder boost responseduring shifts and can limit the amount of boost pressure that can bebuilt by your turbocharger. PERRIN™ offers, for your Legacy GT or 08WRX, a BOV that can handle any amount of boost your turbo can create!

For clients that demand idle quality, and the best in drivability weoffer a fully recirculated BOV. Like the stock BOV, the PERRIN recircBOV keeps the vented air in the intake system to keep the ECU happy andrunning smooth.  BOV's that vent to atmosphere can run rich betweenshifts causing backfires, can cause idle issues, and part throttledrivability on cars that have MAF sensors. This is due to metered air,the ECU thinks is being ingested by the engine, being expelled to theatmosphere.  Popular cars with MAF sensors, are all Subaru WRX, STI,Legacy GT, Forester XT, Mitsubishi Evolution 8-10, Nissan GT-R, andmany other popular turbo cars.

With the PERRIN BOV, there is no reason to add more washers or changethe spring to allow it to hold more boost. Our BOV works very differentthan others in that there is no need to have a spring to hold boost! The boost pressure is put on the back of the piston to keep it closed,and helps keep the piston from lifting prematurely.  This allows theBOV to hold more than an almost unlimited amount of boost!   $229.99