With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized perfectly to relieve any amount of boost pressure without fear of compressor surge. Don???t be fooled by giant oversized blow off valves, these inlet and outlet sizes were chosen to ensure the perfect balance of flow and to maintain boost in your system, without ruining response by dumping too much boost.
The PERRIN Blow Off Valve cap features adjustable spring tension, which allows for an adjustment when the blow off valve vents. A looser setting will make it act smooth and more like stock. Setting it harder will cause it to vent later and with significantly increased boost levels. This adjustment is important in maintaining air within the boost system without reducing turbo response.
The unique design allows you to control the volume of air released when the blow off valve vents. Adjusting the volume of air helps maintain the perfect amount of boost in your system during shifts without causing compressor surge. Venting too little can damage the turbo, venting too much air can make the throttle less responsive. This adjustment is independent of the relief pressure allowing for a totally customizable blow off valve.
It is vital that a blow off valve for your WRX/STI recirculates the air back to the intake track to maintain proper air-fuel ratio and driveability between shifts. While this can be set up as a vent-to-atmosphere style blow off valve, we only recommend that on cars running aftermarket Speed Density type tuning (cars without mass airflow sensor).
The PERRIN Blow Off Valve requires very little maintenance but when needed, its very easy and quick to disassemble. Two O-rings are used to seal vital components from the elements making for extended time between service intervals. There are no special tools required and maintenance can be performed without removing the blow off valve from the vehicle.
Included with every PERRIN Blow Off Valve are the necessary components to make this a direct bolt-on for your WRX/STI. Each blow off valve is pre-set out of the box to work perfectly with every application, so no adjustment required. The PERRIN Blow Off Valve cap, piston & 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 makes for a clean look that reduces potential failure points and leaks without additional parts. The PERRIN Blow Off Valve body comes in either a black or red anodized finish and the cap comes black anodized. The anodizing keeps the blow off valve looking great during its lifespan. The blow off valve body and cap are pad printed in vibrant lettering to make it easier to read.
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Make
Vehicle
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Model |
Submodel |
Year |
Engine |
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2004-2017
Subaru
STI
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STI |
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2004-2017 |
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Who is Perrin Performance?
Perrin Performance is an aftermarket company that manufactures high-performance products, specifically for Subaru. They have become the go-to brand of many Subaru owners who seek to improve the performance of their vehicles. Today, they are a world-renowned brand and is currently being used by thousands of enthusiasts worldwide.
Not Your Ordinary Aftermarket Brand
With dozens of aftermarket brands supporting the most common import car platforms, Perrin decided to take a different path and chose another platform to work on. Subaru is known for creating high-performance vehicles and has created one of the best cars in the world of Rally Racing, Circuit Racing, and Time attack events. Using this as their foundation, Perrin was able to further improve an already good performing vehicle, making it more competitive.
Perrin offers a wide range of products. This includes suspension components, chassis braces, wheel spacers, interior components, intake systems, and engine performance, to name a few. They have been working on Subarus for the longest time. Hence, they understand what it really takes to make these vehicles perform well on the street and on the track.
Purchase Perrin Products at Vivid Racing
If you are in search of a quality product that would help you further improve the performance of your Subaru, then Perrin is the right brand for you. They are the leading experts when it comes to Subaru Tuning and has consistently provided its customer excellent product and aftersales service. Visit Vivid Racing and check out their list of products that fit your specific requirement.
PERRIN Performance Warranty Terms
Your product may come with a 1-year, 5-year, or Lifetime warranty from PERRIN Performance. You can find the warranty length on the product detail page here at PERRIN.com, or by referring to the warranty that came with your product.
WARRANTIES
The ASMC, LTD. (dba ALTA and PERRIN Performance) warrants to that original retail purchaser ("Purchaser") who holds title to the vehicle on which the parts are originally installed will, when delivered, substantially conform to the respective written Product description furnished to Purchaser. Products should be free from defects in material and workmanship (excludes cosmetics, coatings, and appearance and applies only to the function of the Product for its intended manner and purpose) within a sixty (60) month period from the date of purchased (purchased on or after October 1st 2010)( Cat-Back Exhaust Systems have a limited LIFETIME Warranty from the date of purchase after January, 1st 2010 ) and will perform in accordance with provided original operating instructions if properly installed, used and serviced on passenger cars. Should a product(s) become defective within such period, purchaser will submit a claim at their cost and return the defective Product to ASMC, LTD. with an accompanying Return Manufacturer Authorization number (RMA) and the sales receipt stating the defects and the circumstances under which the defect occurred in which case ASMC, LTD. will examine, and upon establishing Purchaser's validity of claim, at its sole discretion repair the Product(s), exchange the Product(s), or refund the purchase price, which shall fully satisfy and discharge any and all warranty claims. Warranty related inquires should be addressed to the following address: ALTA and PERRIN Performance c/o Warranty Service 3111 NE Shute Rd. Suite #101 Hillsboro, Oregon 97124 and must have the RMA# on the outside of every box received. This warranty extends only to the Product(s) installed in such vehicle model as specified for the respective Product(s) and does not extend to any Product(s) (i) which has been used or operated inconsistent with its intended use, (ii) has not been properly installed by a qualified licensed auto mechanic experienced in the installation of the Product(s), (iii) installed in a vehicle that has been used for racing or off road use only (Product(s) specifically designated for "off-road" use may be submitted for warranty claim. ASMC, LTD. holds sole discretion to warranty claims on those Product(s) not to exceed the sixty month limitation above.) , (iv) which was modified or repaired by anyone other than ASMC, LTD. personnel, (v) damaged because of misuse, neglect, accident or improper installation or service, (vi) Sold or used outside the United States of America. In addition, the warranty shall NOT apply to catalytic converters, electrical products, and all components not manufactured by ASMC, LTD. Manufacturers and user of motor vehicles incorporating ASMC, LTD. products should at all times take necessary precautions against damage to persons or property resulting from malfunction of the products.
THE WARRANTIES SET FORTH HEREIN ABOVE ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED. THE SALE IS MADE ON THE EXPRESS WITH THE UNDERSTANDING THAT THERE IS NO IMPLIED WARRANTY THAT THE PRODUCTS SHALL BE FIT FOR ANY PARTICULAR PURPOSE. THE PURCHASER ACKNOWLEDGES THAT THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION HEREIN. IN NO EVENT SHALL ASMC, LTD. BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL, OR SPECIAL DAMAGES, AND DAMAGES ARISING OUT OF THE PURCHASE, UNLOADING, HANDLING AND THE USE OF ANY PRODUCTS, ALL OF WHICH ARE WAIVED BY PURCHASER. IN ANY EVENT, DAMAGES HEREUNDER SHALL BE LIMITED TO A MAXIMUM OF THE PURCHASE PRICE OF THE RESPECTIVE PRODUCT. THIS WARRANTY GIVES THE CONSUMER SPECIFIC LEGAL RIGHTS AND THE CONSUMER MAY ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE. PERRIN and ALTA Tuned ECU maps are for off road use only. Use of a PERRIN / ALTA Tuned Map may void vehicle warranty. Client is responsible for providing correct information about their vehicle to ensure the proper map is provided. Failure to do so can cause engine damage not covered by any PERRIN or ALTA Warranty. Customer assumes all risk of engine damage from running PERRIN / ALTA Custom Tuning. PERRIN and ALTA Performance is not liable for loss of warranty or damage incurred to your vehicle when running custom tune. If you have any questions about ECU Tuning, please email tech@PERRIN.com, tech@ALTAPerformance.com or contact us via phone at 503-693-1702.
SPECIAL NOTE ABOUT SUSPENSION & EMISSIONS RELATED PRODUCTS:
Many modifications (and combinations of modifications) are not recommended and may NOT be permitted in your country, state or other form of local government. Consult your owner's manual, instructions for each product and all laws before undertaking these modifications. The owner and user are solely responsible for the legality and safety of the vehicle you modify using these components! ALTA and PERRIN Performance are not responsible for any physical or financial damages as result of proper or improper installation, usage or ownership of this product. Use of suspension products will result in a change in the handling characteristics of your vehicle. As with ANY vehicle, extreme care must be taken to prevent loss of control or roll-over during all driving maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death! Once installed do NOT drive the vehicle unless you are familiar with its unique handling characteristic and confident in your ability to maintain control under all driving conditions.
All engine and exhaust components (Including but not limited to the following: turbo systems, ECU Tuning, exhaust pipes, intake systems, supercharger pulleys, intercoolers etc.) have been designed and intended for off-road applications only. These components are legal in California for racing vehicles only, which may never be used on public roads or highways. Federal and many state laws prohibit the removal, modification or rendering inoperable of any device or element of design affecting vehicle emission or safety in a vehicle used on public highways. Violation of such laws may subject the owner or user to a fine or penalty. Check your local and federal laws prior to installation! Installation of performance products may void vehicle warranty coverage, if any, on your vehicle. Vehicles modified by the use of performance parts may no longer be lawfully used on public highways. Re-sellers, installers and end users assume all costs and risk associated with these items. ASMC LTD. is not responsible for any losses incurred from the use of any and all products sold.
SPECIAL NOTES ABOUT EXHAUST RELATED PRODUCTS.
We will not warranty any exhaust part that either fails or has warped flanges due to header wrap being installed. While header wrap protects the engine from heat as well as provides some performance benefits, it greatly reduces the life of any stainless steel part. Header wrap greatly increases the rate of corrosion, added to that the actual temperature of the metal is much hotter, reducing its lifespan even further. Operation of vehicle without installation of splash guard will void warranty.
We will not warranty any flanges that are warped away from the weld if any aftermarket gaskets are used. Only OEM Subaru / Toyota gaskets are to be used on PERRIN Exhaust parts, with the exception of downpipes for turbo kits. Subaru / Toyota provides the proper crush gasket that still becomes flat when tightened (or over tightened) in comparison to aftermarket gaskets which can have a crush ring that is too thick, causing a hot-spot in the middle of the flange. These will warp the flanges of your PERRIN exhaust, causing a permanent exhaust leak that will not be fixable with a new gasket.
WARNING: Cancer and Reproductive Harm
