CORKSPORT Mazdaspeed 3/6 MZR Bypass Valve

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

How To Install the Mazdaspeed MZR Bypass Valve

It will take you Approx. 1 hour to install.

1 Hour Install Time

1/5 Difficulty

2-Year Warranty

No CEL

Worth every cent! better response and with more mods I do, I don't have to worry about issues the stock unit may cause like leak and slow response with higher boost levels.

Michael Megara02/08/2015, 08:34 AM

The BPV installed in about 5 minutes with no issues. The car is also running a CS SRI with turbo inlet. Everything else is stock. The car holds boost better into the high RPMs. The car also spools back up between gear changes faster which makes the car faster overall. The sound is slightly sharper than the stock BPV though no louder but with a muted whistle on low-pressure discharges. This was an excellent upgrade to my 2012 MS3.

Todd Eric01/08/2015, 04:12 PM

Was so easy to install, and made a difference for holding boost at low throttle. Wish I had bought this sooner!

Scott Ellis01/02/2015, 02:42 PM

Holds boost, sounds like a canary at part throttle, comes apart easily for cleaning.

Only gripe is that the 6 screws that hold it together were rusted within 6 months...

Matt Z.12/16/2014, 09:07 AM

All I have to say is WOW. Huge difference. Get rid of your stock valve and get this bad boy. My turbo pulls strong throughout the entire powerband now, didn't know what I was missing out on. Another fantastic part from CS.

Timothy Douglas12/03/2014, 02:58 PM

This is definitely an outstanding product!!!!! You get performance and sound at the same time. My car is running much stable in boost. Really quick boost recovery due to fast operation of valve. The beautiful black stealth finish is really nice and looks good on the engine bay. I was surprised on how great this valve sounds. For being a bpv not a bov, it sounds pretty pronounced and very aggressive when wot. For those of you who want best performance drivability and a touch of sound, this is the valve for you. I regret not buying it before! No other valve is faster on the market right now! Don't think about it twice, just pull the plug and purchase this valve for your MS3, trust me, you won't regret it. The guys at corksport have an outstanding support, I was called by Spencer a few days after, just to make sure everything with the product was going as expected and this speaks for itself about the outstanding customer service they have. Spencer, Dereck, Brandon etc. they all are great at what they do. Corksport keep on making top notch products.

Thumbs up for corksport for such great bypass valve for the ms3.!!!!

Ok, you have read all of this review and the rest of the reviews so go do yourself a favor, pick up the phone and place an order for this valve. When you get it, you are going to regret not ever buying it before.

Eliwwjd@yahoo.cm11/05/2014, 06:08 PM

Installation was incredibly easy. Looks great, feels great, sounds incredible with my CorkSport SRI. Must buy!

Jose Dejesus10/24/2014, 09:47 AM

Another great product from this fantastic performance parts specialist. A lot better than the standard BPV, sounds cool too.

Paul Terry10/16/2014, 08:34 AM

Great looking product. Easy install. CorkSport had me sold by telling me this product increases the life of my turbo. With all the performance mods, I wanted to take every precaution to keep my engine safe at the same time. Make sure you transfer the stock rubber gasket to your new CS MZR BPV.

Steve Kizer06/16/2014, 11:25 AM

I have enjoyed all my corksport upgrades, and this one is no different! Boost holds firm and releases in a very mature sound, quality is superb, and is a super easy install! Buy this for your MS3!

Jordan Robison06/03/2014, 12:57 PM

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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)

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

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

Just to verify, this will pass smog in California?

Asked by Garrett | 12/19/2016, 12:53 PM | 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)

Would this fit my stock 2008 ms3?

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