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Mazdaspeed MZR Bypass Valve

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Price: $199.99
Price in points: What are Points?200 points
Mazdaspeed 3/6 MZR Bypass Valve BPV
GEN-6-457-10
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This product can't be added to cart now. It will be available on 04/20/2069
Mazdaspeed Bypass Valve upgrade
Add performance and style while protecting your turbo with the Patent Pending CorkSport Mazdaspeed MZR Bypass Valve. Using an innovative patent pending design utilizing a wave spring, we were able to reduce the spring height of the OEM Bypass Valve by 50%. This size reduction provides the same amount of force while accelerating the speed of the valve. By increasing speed the Bypass Valve effectively increases the life of your turbo by preventing premature wear since the BPV can safely move at speeds 33% faster than stock or other valves. With the extra space allowed by the spring, we were able to increase piston size by over 30%. The increase in size means the bypass valve has a larger venting area, which reduces the time it takes to vent air, allowing larger turbos better venting. Together the smaller size of the spring, and the piston redesign means the body of the valve was reduced. This means you don't have to worry about interference with key parts such as airboxes, custom turbos, intercooler kits, or other modifications that might need the room. Thanks to these innovations the patent-pending CorkSport Mazdaspeed MZR Bypass valve will be a welcome addition to any turbocharged engine bay.

*This kit comes with everything you need to upgrade from your factory BPV*

The CorkSport Advantages:
  • Fitment:Mazdaspeed 3, Mazdaspeed 6, Mazda CX7
  • Larger Piston Area: Increased piston area allows greater venting.
  • 50% Decrease in Spring Size: Smaller spring is 33% faster at reacting
  • Made from billet aluminum: For a lightweight and durable build.
  • Compact Size: Patent pending design uses less space compared to the OEM bypass valve means you have more room for modifications.
  • CorkSport Service and Support: Receive a two-year limited warranty, full color installation instructions, all of the needed installation hardware, and knowledgeable telephone support.

Patent Pending

Replacement Mazdaspeed bypass valve


How To Install the Mazdaspeed MZR Bypass Valve

It will take you Approx. 1 hour to install.

1 Hour Install Time

1 Hour Install Time

Difficulty: 1/5

1/5 Difficulty

2-Year Warranty

2-Year Warranty

No CEL

No CEL

How to installation instructions for the Mazdaspeed MZR Bypass Valve

Installed this part about a year ago now, and it’s still working as strong as ever. Definitely use the supplied vacuum hose or anything besides reuse your old vacuum hose. I tried to use the OEM vacuum hose and it had gotten so old being clamped to the stock BPV that it wouldn’t seal to the new one. Replaced the hose after the first test drive and now it’s been problem free. Probably time to service it lightly.
Alek Pfeiffer11/12/2025, 06:56 AM
"This kit comes with everything you need to upgrade from your factory bpv" except hardware and gasket..
it is only the bypass valve and nothing else. These pieces are needed for install and now have to be sourced seperately.
Mike Pittsinger01/30/2024, 03:24 AM
I bought this back in 2014 and till this day still works like a champ. It really helps a lot in the way it recirculates the air.
Rafael Raas07/07/2020, 12:02 PM
Worked fine for about 2 years, then the wave spring broke in 2 places. still sort of worked and took a bit to figure out why the release had become so sudden. MS6 is stock except for SRI, and boost is never over 15.5. Unreliable.
Tres303/04/2017, 07:20 PM
Happy to have purchased this gem, very easy to install; I drive a 2008.5 Speed 3. I also purchase and installed the silicone bpv hose at the same time.
Sean McLeod08/23/2016, 08:02 PM
I have a 2012 Mazda 3 MPS (Mazdaspeed 3). Installed this about 10 months ago and did around 15,000km on it. I've got a stage 1 custom tune with intake mods only. About a week ago, I noticed a drop in performance with an audible whistling noise whilst on the throttle at low RPM (which I'm pretty sure was boost leaking from the BPV). Venting sound of the BPV also became more drawn out (as opposed to a quick, efficient whoosh). Removed the BPV and opened it up to have a look and found that the spring for the piston was completely broken into 3 parts. My car is driven sensibly and not thrashed. Not happy at all with the quality. Purchased a Turbosmart Kompact BPV and installed today and the car feels great again. Puts me off buying more stuff from Corksport. Don't usually like to leave negative reviews but this really irked me, sorry. Better off buying a cheaper valve in my opinion.



***CorkSport Reply: Kev W contact us so we can help you out via telephone or via email contact here on our webpage ***
Kev W07/30/2016, 05:12 AM
Quieter than stock, but wow does it perform!
Enrique06/16/2016, 06:39 AM
Super easy to install, make sure gasket is lined up and just torque down to 7 ft/lbs(80-85 inch/lbs), transfer the vacuum/boost hose from the plastic OEM BPV nipple to the CS metal (super strong never gonna snap) nipple along with the bypass hose and yer set for s\anything but a crazy 10k engine/turbo build.



Fast response, good reliability, some increased turbo life. And full Sleeper Action. Gotta love it!
Aaron Waller10/29/2015, 11:16 PM
LOVE the new sound this BOV and SRI added to King_6. I only wish the blow off could be louder... Thanks CS! Next in line is my fuel pump internals.



#MazdaAllDamnDay
Lee Louisville07/26/2015, 06:39 PM
Awesome product. Much crisper pressure release and sound compared to stock BPV. Very happy with this BPV. Highly recommend!
Kyle Compton05/29/2015, 06:51 PM
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Hello, Probably a weird question but im wondering if you know what dimensions the 2 10mm bolts for the bpv are? one of mine has snapped and i cant find any infromation about the size of it. Thanks^^

Asked by Philip | 06/04/2025, 09:54 AM | 0 answer(s)

Would this be Compatible to a 2.0 Mazda 3 04-10 motor ?

Asked by Jordan Ruiz | 08/13/2022, 07:59 AM | 1 answer(s)

Can I use a gasket instead of o-ring if desired, the BPV I am replacing uses gasket type. Thank you V/R Anthony

Asked by Anthony | 09/08/2019, 02:55 PM | 1 answer(s)

do i need to get a gasket to place it in between the manifold and BPV?

Asked by DAVID | 04/12/2019, 03:23 PM | 1 answer(s)

heard that bypass valves can affect engine longevity, is that the case?

Asked by Jesse | 06/04/2018, 11:46 AM | 0 answer(s)

Can I use air tool oil to relubricate the piston and rings like the vta valve? Or is there a better option?

Asked by Terrell Blackman | 11/07/2017, 07:43 AM | 1 answer(s)

Is this bpv better then the mazdaspeed 3 duel vta bpv?

Asked by Eden | 12/20/2016, 06:30 AM | 1 answer(s)

Just to verify, this will pass smog in California?

Asked by Garrett  | 12/19/2016, 12:53 PM | 1 answer(s)

Would this fit my stock 2008 ms3?

Asked by Pascal Cadieux | 10/30/2016, 02:44 PM | 0 answer(s)

Can you please tell me if this comes pre lubed? Thanks

Asked by Daniel Blanchfield | 09/26/2016, 04:56 PM | 1 answer(s)

I am pretty sure my stock valve is leaking at bout 19PSI. While I am using the stock turbo now I may want to upgrade later and increase the boost. I want to know how much boost this valve is designed to hold. I understand that it vents fast and that is great, but I want to make sure it also holds boost. If it sounded like Stock I would like it better, just not a fan of drawing additional attention. Thanks Jon

Asked by Jon Gatewood | 05/22/2016, 05:17 PM | 3 answer(s)

What boost PSI will this valve hold and is it adjustable?

Asked by Jon Gatewood | 05/13/2016, 07:46 AM | 3 answer(s)

Will this fit on my 2010 Mazda 3 even if it doesn't have turbo?

Asked by Travis Certeza | 04/08/2016, 03:58 PM | 0 answer(s)

Will this bpv work with if I have stock intake with box?

Asked by marty03 | 04/08/2016, 11:43 AM | 0 answer(s)

Will this part fit an 08 cx7 awd

Asked by Joseph | 02/24/2016, 10:35 PM | 1 answer(s)

I do not hear any sound? is this normal?

Asked by Francisco Sanchez | 02/23/2016, 04:26 PM | 1 answer(s)

Do you really have to clean it every 6 months?My stock 2013 which I got with 3 Miles on it now has 9500 Miles in two years has never been cleaned.

Asked by Kirk | 07/22/2015, 11:17 AM | 1 answer(s)

Is it possible under low pressue for the valve to not open up. At idle ill rev to 3k i get a whistle that unwinds as the rpms do almost sounds like compressor surge.

Asked by Stephen Duran | 06/30/2015, 10:17 PM | 1 answer(s)

Would like to know if this particular bpv would fit and work properly on 2006 ms6 being that the Ms3 has the same motor and turbo?

Asked by Damien | 06/15/2015, 08:52 AM | 1 answer(s)

how does the CS BPV compare to the Forge V2 BPV? and why CS over Forge? thanks for the help.

Asked by Michael  | 04/13/2015, 08:39 AM | 1 answer(s)

if I added this bypass valve to my stock car (only have an axle back exhaust from corksport) would I need to get an access port as well as have it tuned or would this function perfectly fine without an access port and or tune?

Asked by Dustin Mauger | 03/03/2015, 07:17 PM | 1 answer(s)
New post
Mazda performance parts financing is available with CorkSport

Looking to finance your parts purchase and want to get 6 months NO interest on any purchase over $199? Click on the image above for more details.

Fits Models:

2007-2013 Mazdaspeed 3
  • 2007 Mazdaspeed 3
  • 2008 Mazdaspeed 3
  • 2009 Mazdaspeed 3
  • 2010 Mazdaspeed 3
  • 2011 Mazdaspeed 3
  • 2012 Mazdaspeed 3
  • 2013 Mazdaspeed 3
2006-2007 Mazdaspeed 6
  • 2006 Mazdaspeed 6
  • 2007 Mazdaspeed 6
2007-2012 Mazda CX-7
  • 2007 Mazda CX-7
  • 2008 Mazda CX-7
  • 2009 Mazda CX-7
  • 2010 Mazda CX-7
  • 2011 Mazda CX-7
  • 2012 Mazda CX-7
Mike Pittsinger
Comment
"This kit comes with everything you need to upgrade from your factory bpv" except hardware and gasket..
it is only the bypass valve and nothing else. These pieces are needed for install and now have to be sourced seperately.
Rafael Raas
Comment
I bought this back in 2014 and till this day still works like a champ. It really helps a lot in the way it recirculates the air.
Tres3
Comment
Worked fine for about 2 years, then the wave spring broke in 2 places. still sort of worked and took a bit to figure out why the release had become so sudden. MS6 is stock except for SRI, and boost is never over 15.5. Unreliable.
Sean McLeod
Comment
Happy to have purchased this gem, very easy to install; I drive a 2008.5 Speed 3. I also purchase and installed the silicone bpv hose at the same time.
Kev W
Comment
I have a 2012 Mazda 3 MPS (Mazdaspeed 3). Installed this about 10 months ago and did around 15,000km on it. I've got a stage 1 custom tune with intake mods only. About a week ago, I noticed a drop in performance with an audible whistling noise whilst on the throttle at low RPM (which I'm pretty sure was boost leaking from the BPV). Venting sound of the BPV also became more drawn out (as opposed to a quick, efficient whoosh). Removed the BPV and opened it up to have a look and found that the spring for the piston was completely broken into 3 parts. My car is driven sensibly and not thrashed. Not happy at all with the quality. Purchased a Turbosmart Kompact BPV and installed today and the car feels great again. Puts me off buying more stuff from Corksport. Don't usually like to leave negative reviews but this really irked me, sorry. Better off buying a cheaper valve in my opinion.



***CorkSport Reply: Kev W contact us so we can help you out via telephone or via email contact here on our webpage ***
Enrique
Comment
Quieter than stock, but wow does it perform!
Aaron Waller
Comment
Super easy to install, make sure gasket is lined up and just torque down to 7 ft/lbs(80-85 inch/lbs), transfer the vacuum/boost hose from the plastic OEM BPV nipple to the CS metal (super strong never gonna snap) nipple along with the bypass hose and yer set for s\anything but a crazy 10k engine/turbo build.



Fast response, good reliability, some increased turbo life. And full Sleeper Action. Gotta love it!
Lee Louisville
Comment
LOVE the new sound this BOV and SRI added to King_6. I only wish the blow off could be louder... Thanks CS! Next in line is my fuel pump internals.



#MazdaAllDamnDay
Kyle Compton
Comment
Awesome product. Much crisper pressure release and sound compared to stock BPV. Very happy with this BPV. Highly recommend!
Chad Carroll
Comment
Great product. Way better then stock. A must have upgrade.. Click Buy!
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