Mazdaspeed Dual VTA Bypass Valve

The CorkSport Dual VTA BPV provides features and performance to suit stock cars and on up to big turbo high-power setups. The CorkSport Dual VTA BPV holds 50psi, responds in 50 milliseconds, and won’t stall your car coming to a stop at idle. All this comes in a compact design with nozzle adjustability to allow for easy installation in even the most cramped engine bay or with custom piping. #ZoomZoom!

Check out the installation instructions below. Share your performance review with the CorkSport community once installed!

The CorkSport Advantage

Responsive Performance

The CorkSport Dual VTA BPV responds as low as 50 milli-seconds keeping pressure in check and the turbo spinning freely. This is made possible with a few key features:

The piston weighs a mere 38 grams with the O-rings installed which reduces the required force (and therefore time) to accelerate and move the piston.
The piston and body design work together to minimize the chamber volume at the top of the piston. With the smaller volume, there is less air to be removed before a full vacuum is present, reducing the amount of time needed to start moving the piston upward.

No Leaks

O-rings are used for all critical sealing interfaces to provide a valve that can stand up to the pressure and has been tested to 50psi.

Dual VTA-Bypass Design

The VTA design of the CorkSport Dual VTA BPV allows the valve to function as a normal full recirculation design for most daily driving situations; essentially during minimal boost pressures and light throttle lift-offs.

The VTA ports will then be utilized for medium to high boost and abrupt throttle lift-offs. The higher boost levels cause a larger pressure differential between the intake manifold and charge pipe during throttle close, resulting in the BPV piston moving further, opening the VTA ports.

Flexible Design

Standing just 2.5” tall, the CorkSport Dual VTA BPV is compact which is great for compact engine bay and custom intercooler piping. The VTA BPV also features an integrated hose port to reduce the chance of leaks and lost parts.

The nozzle features 3-way adjustability allowing the nozzle to point 15 or 30 degrees off-center.

Additional Features

Materials & Manufacturing: All designed components are CNC machined from 6061-T6 and anodized for long-lasting durability then bolted together 18-8 stainless steel hardware.
Serviceable Design: What good is a performance part if you can’t properly take care of it? The CorkSport Dual VTA BPV can easily be disassembled, cleaned, and re-greased for long-lasting performance.
Compatible with: MZR DISI Engine found in Mazdaspeed 3, Mazdaspeed 6, and CX-7
Any Climate: Tested to sub-zero temperatures to ensure operation in extreme conditions.
Designed & Developed in America: CorkSport Mazda Performance is resides in Vancouver, Washington and is located in the beautiful Pacific Northwest.
CorkSport Service & Support: 2 year limited warranty, full color installation instructions, all necessary components, and knowledgeable telephone support at (360) 260-2675.

How To Install Your CorkSport Dual VTA BPV

It will take you 30 minutes to install the CorkSport Dual VTA BPV with our easy-to-use instructions.

30 Minute Install Time

2/5 Difficulty

2-Year Warranty

No CEL

For this BPV I will say I give it a thumbs up. It sounds better and feels better than stock. It was easy to install. If you live in California keep your OEM BPV for smog (they will make you change it or pay them extra). It does have an annoying whistle when light on the pedal (it's like Ricky Bobby it just wants to go fast!).

Paul12/09/2023, 11:11 AM

What can I say, this and it's simplest form works well. It really just comes down to how you want your off throttle noise to sound. With this and it's normal configuration, you get a little bit of whistle with low boost off throttle, hi boost you get a nice pstSSHH. I personally configured mine with a freeze plug in the bpv portion (no recirc) so under low boost you get a nice choo choo and the same pstSSHH under high boost off throttle.

Brandon Chap01/19/2023, 02:58 PM

Fast shipping. Lets out a nice whoosh sound. No squeals or whistle noises. Silent under no/very low boost. Initially installed without replacing the stock hose which was a mistake. Had a lot of turbo flutter (bad) for all boost levels as the valve would not VTA. After replacing with the provided hose (which has a smaller diameter than stock) VTA works perfectly. When taking taking the stock hose off on the engine side you have to pull straight up. I was not sure initially which way it was oriented due to it being buried out of good view. Recommending to reach underneath and loosen slightly before pulling from the top and working it off.

Louis04/11/2020, 04:44 PM

I'm not sure why the sound is getting negative reviews because it sounds great. Very easy install and paired with the CS Stage II SRI+TIP it performs great.

Chris Doms07/03/2019, 11:22 AM

It works like a good bpv should, however the squeal it has is similar to a slight brake pad going shitty. You'll hear it when your driving around town and cruising on the highway. If you like the sound of squeaky brake pads to happen all the time, then this valve is the one for you!

Michael10/20/2018, 11:22 AM

Did not like this BPV. It whistles like a cheap plastic whistle ALL the time. Sounds like brake squeal under vacuum and cruising speeds. Everyone who rode in my car would ask what the sound was. I have used many different valves on my cars over the years and have never had one annoy me before. It seemed to work fine but honestly no better than their MZR bypass valve which I re-installed and am pleased with. MZR bypass valve is the best I've ever used so I'll stick with that.

David Deaton05/21/2018, 06:41 AM

Before I bought this, I didn't know what a BOV was. Now, I think the thing is the coolest thing on my MS3! I never heard anything but what I thought was the turbo spooling up when I put the Stage II CAI on my Speed. When the BOV was installed, that cool sound went away and instead I heard this whistling sound every time I shift. I noticed a drop in my average mileage, but now think it was from accelerating faster and more often. So, now I need to figure out how to include this valve in my increasingly modded MS3. Tomorrow I get the oil catch can, which might reduce my soot(?) and my question is "when do I stop modding?" I guess the answer is "not yet".

Pastor Dave Poedel12/26/2017, 07:05 PM

Had it for a couple months now with zero issues! I am full bolt ons and purple drank tuned on stock k04. Whistles under light loads and even during cold starts I can here it whistle slightly as the rpms drop. I have no drivability issues, it bolted right up. Only complaint I have is that it doesnt come with an oring, you need to reuse your stock one, not there fault but I bought my car with a forge v2 and I didnt get the stock valve with the car or the o ring, it used a different o ring so I had to order a new one from Mazda. Other than that its great.

Kyle W.12/12/2017, 10:18 AM

They don't send a new o-ring. It's like what, $3? Instead of using a potentially old and cracked one, or not even having one as in my case. Just another way CS continues to make things more complicated than they need to be.

A-ron07/11/2017, 03:41 PM

Installed this BPV yesterday and right off the bat i have to say i love the high pitched chirp i get with just about every shift. Made a noticeable difference in the way the car builds/holds/releases boost. Once you hit the clutch to shift at WOT the turbo lets go of the pressure and is IMMEDIATELY ready to spool again and spool fast! My only gripe is the small whistle you get under cruising speeds. It's not a bad sound. Just different. I feel it will grow on me. Also received pretty incredible service from Brett. Would recommend this part to any and everyone who is modding their MZR DISI!!!

Dylan03/30/2017, 09:39 AM

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So is the vta adjustable? Is this the same thing as a bov?

Asked by Tayler | 09/13/2023, 08:42 PM | 1 answer(s)

Can i run this as a blow off valve with non recirculating intake with the recirculating hose not hooked up to the valve?

Asked by Adam Mendelewski | 10/07/2023, 06:43 AM | 1 answer(s)

Will I have issues with a California smog check?

Asked by Ed M | 03/08/2022, 08:05 PM | 1 answer(s)

I need to replace one of the internal o-rings inside my bypass valve. (one is broken and the others are also old and hard). What are the diameter and thicknesses of the two types of internal o-rings? Thanks!

Asked by Kevin Whitehead | 01/19/2021, 05:25 PM | 1 answer(s)

Just to be sure, can you run this on a 100% bone stock mazdaspeed 3 with no hpfp or tune and it will be safe?

Asked by Jarrett Sutherland | 01/05/2021, 08:19 PM | 1 answer(s)

How far should I drive for maintenance?

Asked by Kazuaki Fukumizu | 10/24/2020, 12:22 PM | 1 answer(s)

I have a 2011 Mazdaspeed3 with intake, turboback exhaust, corksport tmic, hpfp and dyno tune is this safe to run it like that or do i need to get re-tuned..?

Asked by Randy Lopez | 10/23/2019, 08:32 PM | 0 answer(s)

What are the differences between this and the Mazdaspeed MZR Bypass Valve?

Asked by Dano Nahabedian | 06/04/2019, 08:42 AM | 1 answer(s)

Do I have to be tune? Or can I run this stock? Well I have an intake and a test pipe

Asked by Alfonso Rodriguez | 05/09/2019, 10:09 PM | 1 answer(s)

Hey! I noticed on the description it says car wont die after idling after i install this..(Im going to purchase this either way) but as a new manual driver that would be a huge benefit if thats true? Does that mean if i come to a full stop with foot off the clutch in gear the car will idle instead of stalling? Thanks!

Asked by Arvin | 04/07/2018, 08:06 PM | 1 answer(s)

I guess I'm unclear as to what the value is, of this item. I don't drag race. Unless it improves torque, I don't know why I should purchase it.

Asked by RJC | 08/30/2018, 06:24 AM | 1 answer(s)

is this a 50/50, bov, or bpv?

Asked by steven | 03/07/2018, 05:05 AM | 0 answer(s)

I am little concerned about the vacuum hose that mounts on top of it, its position makes it difficult to using a clamp there. So, can we use the stock hose with the clamp there or we have to install a hose provided with the BPV.

Asked by Vic | 09/29/2017, 05:55 AM | 1 answer(s)

What the difference between this and the MZR Bypass valve - is it just the ability to switch to VTA? I have the CS Airbox on my car right now, will either option fit?

Asked by Adrian | 12/13/2016, 01:11 PM | 1 answer(s)