2008-2014 Subaru WRX Recirculating BOV by Perrin
The small outlet on the OEM BOV limits boost discharge speed and is prone to leaking. The PERRIN BOV eliminates this concern with a much larger outlet that is fully adjustable. Featuring a large 1.225-inch inlet and outlet, the PERRIN Blow-Off Valve is perfectly sized to vent any amount of boost pressure without fear of compressor surge. These inlet and outlet sizes were chosen to ensure the perfect balance of flow, keeping boost in the system without dumping excessive boost and ruining response.
The PERRIN Blow-Off Valve cap features adjustable spring tension, allowing you to tune how the blow-off valve vents. A looser setting provides smooth, near-stock operation. A tighter setting slows venting and significantly increases boost levels. This adjustment is crucial for maintaining air within the boost system without degrading turbo response. Its unique design allows you to control the amount of air released when the blow-off valve vents. Adjusting the air volume allows you to maintain the optimal amount of boost in the system during shifts without causing compressor surge. Releasing too little air can damage the turbo, while releasing too much can reduce throttle responsiveness. This adjustment is independent of relief pressure, allowing for a fully customizable blow-off valve.
It is important that the WRX/STI blow-off valve recirculates air back into the intake track to maintain proper air-fuel ratios and drivability between shifts. The PERRIN Blow-Off Valve requires little maintenance, but if necessary, it can be disassembled very easily and quickly. Two O-rings are used to seal critical components from the elements, helping to extend service intervals. No special tools are required, and maintenance can be performed without removing the blow-off valve from the vehicle.
The PERRIN Blow-Off Valve cap, piston, and flange are all CNC-machined from 6061 billet aluminum. The PERRIN Blow-Off Valve body is CNC-machined from a single block of aluminum. This reduces potential failure points and leaks without the need for additional parts, providing a clean appearance. The PERRIN Blow-Off Valve body comes in a black or red anodized finish, with a black anodized cap. All PERRIN Blow-Off Valves include the components necessary for a direct bolt-on installation for the WRX/STI. Each blow-off valve is pre-set out of the box to perform perfectly in any application.
Features
- CNC-machined 6061 aluminum construction
- Red or black anodized finish (cap is black)
- Recirculates air into the intake track
- Adjustable relief pressure (spring tension)
- Adjustable flow control (air volume)
- Low maintenance, no special tools required
- Direct fit, pre-set and ready to install
Applications
- 2008-2014 Subaru WRX
Benefits
- Reduced response time
- Consistent boost
- Perfect seal
- Improved drivability
Specifications
- Body Material: 6061 Aluminum
- Body Finish: Anodized
- Piston Material: 6061 Aluminum
- Piston Finish: Anodized
- Spring Material: Stainless Steel
- Flange Material: 6061 Aluminum
- Cap Material: 6061 Aluminum
- Cap Finish: Anodized
What's in the box?
- 1 - Perrin BOV
- 1 ft - 1/4" fuel hose
- 2.2 ft - 1/2" fuel hose
- Necessary hardware
- Instructions/Manual
- Warranty information
References
Warranty
- PERRIN Performance warrants that this product will be free from defects in material and workmanship for 60 months from the date of purchase.
Before Ordering
○Regarding Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
○Confirmation of Fitment
All product databases are based on North American vehicles (USDM). Please confirm whether the item can be installed on a Japanese vehicle (JDM) before ordering. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will look into it for you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, manufacturer, and vehicle model on the tabs on our top page, they are not necessarily compatible with Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. There may be confusing expressions, so please contact us before ordering if you have any questions.
○Regarding Shipping
Shipping costs are paid at the time of payment. Shipping estimates are automatically calculated when you enter your shipping address on the checkout page. For large items such as body parts, there may occasionally be a significant discrepancy between the automatically calculated shipping cost and the actual cost. In such cases, we will contact you individually via email.
Basically, all products are shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with enough time to spare. If you are in a hurry, please inquire about the delivery date in advance. All products are transported via air freight; they are not shipped via sea freight.
○Regarding Japanese Vehicle Inspection (Shaken) Compatibility
The products we handle are basically all designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese Vehicle Inspection System," and we cannot provide documents such as strength calculation reports for Japanese vehicle inspections. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," and installation and use are at your own risk.
○Regarding Warranty
Please check the contents immediately upon arrival of the product. Since all products are shipped internationally from outside of Japan, there may be shipping damage to the packaging box or the product. For damaged, defective, or incorrect products, we will handle returns, refunds, or exchanges only if contacted within 7 days of receipt. Please note that for products sold through us, warranty-related support will be handled "only through us." We do not provide support through other companies or distributors located in Japan.