COBB Tuning Blow Off Valve

Part #: COB 712650
( 18 reviews )



Free Shipping

Free Shipping offer applies to orders over $200.00 to the 48 states via UPS Ground or USPS Priority.
Offer Excludes shipments to Alaska, Hawaii and Military Boxes. Items that are too large to ship via UPS or USPS are excluded from this offer.
Please read more on our full shipping policy HERE

   In Stock: Ships the Same Day
Return Policy | Shipping


This product is covered by our
RallySport Guarantee
No questions asked 30 day return policy


Brand: COBB Tuning
Adjustable: Yes
Color: Black
Design: Piston
Includes Gasket(s): No
OEM Replacement: Yes
QTY: 1
Valve Type: Recirculating
Mfgr. Warranty: 1 Year
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee


Subaru Impreza
WRX STI 2004, 2005, 2006, 2007WRX STI Limited 2007WRX STI Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX STI Special Edition Hatchback 2010WRX STI Limited Sedan 2011, 2012, 2013, 2014WRX STI Limited Hatchback 2011, 2012, 2013, 2014WRX STI Sedan 2011, 2012, 2013, 2014WRX 2002, 2003, 2004, 2005, 2006, 2007WRX TR 2006, 2007WRX Limited 2006, 2007
Subaru Forester
XT Limited 2006, 2007, 2008Sports 2.5 XT 2008
Subaru WRX STI
Base 2015

The Cobb tuning Blow Off Valve which is also a hybrid valve. Hybrid blow off valves come in 3 different valve configurations.  You have fully recirculating where you utilize the provided elbow off the blow off valve where it recirculates back into the intake.  The second option is fully atmospheric which is going to give you the loudest sound, however the air does not get recirculated back into the intake, and the ECU will think the air is provided which will create a slight rich condition in between shifts.

The Hybrid option gives you a 50/50 valve.  50% vents back into the atmosphere, while the other 50% gets recirculated back into the intake. You can remove the flange plate on the rear to make that happen. 

Compared to stock, the Cobb Tuning Blow Off valve has been crafted out of high grade anodized aluminum, and overall is a better upgrade than the OEM unit whether if your supporting more boost, or if you’re stock.  The design is close to stock compared to other blow off valves as well. Overall, you will be satisfied with the Cobb Tuning Blow Off Valve.

REVIEWS ( 18 )


Verified Purchase
Light and snappy bpv
dszydel68328 3 months ago
I am stage 2 with stock turbo at 20 psi. I noticed I was only peaking 19 psi on some pulls so I ordered a go fast bits bpv. It was too heavy and I had flutter at low boost so I ordered the lighter cob piece. Super easy to install because it's 2 screws and a hose, without putting the stock nose back on. It's pretty much ready to go out of the box. I gave it 2 turns to the right to tighten up the spring a big. Vents between 2 psi and 20, holds all my boost and sounds fantastic. Obviously another great product from cobb

Not over the top!
Stevend21860717 6 months ago
Recently built my forester XT, and wanted a stock look and sound. this BOV kept the car subtle, but still gave just enough boosh to know it wasn't stock if i wanted to let people know.

Holds up 21 pounds and wants more.
Luis Pelaez 8 months ago
This valve is absolutely amazing. Installed it a month ago. I come from a WRX with the COBB BPV. And now I own an STI. Let me tell you that the stock BPV won't handle 21 psi like this COBB one. After I installed it boost felt smooth and recirculating sound was improved from stock. Now on 100:100 sounds like if it was 50:50. Perfect sound, fitment and result. Thanks RSD you guys sell nothing but the best.

Worth Every Penny!
jax2014 9 months ago
Super easy to install, includes everything you need except a gasket. Eliminates boost lag and sounds great overall! Definitely worth every penny (&the processing and shipping is fast too!)

Cobb quality
awangard.motors35013 11 months ago
Using it with FMIC setup , with 100% recirc mode - holds solid 27psi. Good product


  • AnswerQ: After installing bpv  ronmaliksi00273886 7 days ago

    After installing the cobb bpv, would I have to reflash the ECU? Noob question... Thanks RSD!

    • A: Tuning is not required for BOV's, so you will be just fine to bolt this right up!

      Brady R 7 days ago

  • AnswerQ: Cobb BPV Question  ronmaliksi00273886 9 days ago

    I recently purchased the cobb BPV. Super excited to get it. Just have a quick question. What setting does it come in when you take it off the box? What do you have to do to have it be set to 50/50? Thanks rallysportdirect! Always a pleasure buying products from you guys!

    • A: The valve will come setup as full recirculating valve. To change it to a 50/50 valve all you need to do is remove the plate on the back of the valve. Once removed, only half will go out the plate and the rest will recirculate.

      Evan M. 9 days ago

  • AnswerQ: 02 WRX wagon  Connor5 4 months ago

    I bet you get these questions alot but I see you say you dont need a tune for this BOV which is confusing cause people always say you do if you get a BOV, but do you really need a upgraded turbo for this or can you run it on a Stock Turbo, and will it give me that Mad BOV sound? Cause honestly thats all im going for lol.

    • A: A blowoff valve can be used on a stock turbocharger. This is a recirculating blowoff valve in original form and will be almost silent, but if you were to remove the atmospheric backing plate you will see a bit of noise when venting to atmosphere. If sound is the priority something like the Go Fast Bits or Turbosmart valve may be the better option.

      Nick S. 4 months ago

  • AnswerQ: 15Sti  RC_1989 4 months ago

    Sorry about this noob question. So do I need to tune my car first to install this BOV ,or I can just install it with out any tune ? And will it have bad effect with my tomei catback?

    • A: Tuning is not required for a BOV and there should be no issues with your Tomei Catback Exhaust.

      Brady R. 4 months ago

  • AnswerQ: Stock gasket  06subaruWRX 5 months ago

    Will this bov work with the stock 06 wrx tmic rubber gasket or will a grimspeed tmic gasket work better?

    • A: This will work with both the rubber gasket or the Grimmspeed bpv gasket.

      Nick S. 5 months ago