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

Very nice piece of equipment, stock-looking (which was a prerequisite for me), and comes with everything needed. Installed in under 5 minutes, since nothing needed modification, moving or altering. In my case, the noise is even more quiet than the stock (though my stock BPV probably had a small leak due to increased boost levels, which caused some noise under certain circumstances). The new BPV holds boosts better, which allows the car to start pulling harder, better and in lower rpms than before. So in my case it was two birds with one stone, fixed the leaking stock BPV and at the same time achieved better performance and boost curves!

Antonis Marinos05/12/2014, 12:18 AM

So easy to install that I did it on my 15 minute break in the parking lot of my office. This thing is a quick as it is advertised. very responsive. Holds boost very well and looks great. Its got a really nice low profile look and makes a pretty original sound above 10psi. Way better than the Forge sword clanging sound, in my opinion.

Christopher DeCaro04/21/2014, 01:44 PM

Another kick-ass Corksports component. Far better than stock and improves the efficiency of the turbo without a doubt. Not loud and obnoxious at all, just does it's job so you can do yours. Parts like this should have been stock in the first place! Can beat the performance, size, and price for what you get! A+

Ryan Feeley04/19/2014, 07:13 PM

Just installed this in the driveway today, extremely easy to yourself. Instructions were as always spot on and helpful ;)

I had absolutely no idea how bad that plastic oem bypass was leaking...this should be your very 1st purchase performance-wise, don't shop around or look anywhere else just add this to your cart and you can thank me later with corksport points. ;)

Christopher Hyndman04/13/2014, 01:38 PM

Great improvement to the smoothness of the power. The stock unit must have been trash. Power was surging and erratic. Installed this valve and the difference is night and day. So smooth and holds boost strong and steady. Makes driving the car a joy.

Paul Ozier04/12/2014, 03:54 AM

Can I combine this with my SRI stage 1 ? Did I absoletely need the accessport ?

Nicolas Ayers04/04/2014, 04:56 PM

Definitely a must especially with the SRI & TIP. Mine sounds a little different from the video, might have a small boost leak since don't have the stock gasket on. Maybe? Either way love it and you could definitely feel the difference. Even my girlfriend like it. #everythingcorksport

Walter Recinos03/13/2014, 10:32 PM

Sounds awesome. I combined it with the SRI/TIP combo and it sounds awesome and can tell a huge difference. Must buy.

Sam03/12/2014, 06:05 AM

Sounds awesome. I combined it with the SRI/TIP combo and it sounds awesome and can tell a huge difference. Must buy.

Sam03/12/2014, 06:05 AM

Wow! what amazing product from CorkSport. Many of people are convinced that the stock bpv hold boost better. Well there wrong. CorkSport bpv is 100 times better than stock. The build, the sound, and how it holds boost. I don't know how the one dude gave 3 stars. The feel and sound is notice. Thanks to another great product CorkSport!

Chris Mays03/08/2014, 04:34 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)