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Mazdaspeed Dual VTA Bypass Valve

Price: $279.99
Price in points:  What are Points? 280 points
Top view of the CorkSport Dual VTA BPV for Mazdaspeed 3, Mazdaspeed 6, and CX-7.
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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 milli-seconds, 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

Mazdaspeed 3 bypass valve

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 full vacuum is present, reducing the amount of time needed to start moving the piston upward.

Mazdaspeed 3 BOV

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.

Mazdaspeed performance bypass valve

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.

Mazdaspeed dual port bypass valve

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 and 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.
  • Engineered in America: Designed and Manufactured in Vancouver, Washington, in the 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

30 Minute Install Time

Difficulty: 2/5

2/5 Difficulty

2-Year Warranty

2-Year Warranty



Installation was a breeze. Only had to remove the intercooler shroud to access and replace the vacuum signal line. One thing of note - I was previously running the TurboSmart Street Unit BPV which does not use the OEM bypass valve gasket. I did have to purchase a new OEM gasket.

After installation and driving the car daily the CS VTA BPV seems to hold more pressure. The response time is quick, and the sound emitted on pressure release is just enough to make you want to shift more often. For daily driving I've been loving the soft chirp when shifting gears. It's audible from inside the car with the windows up and music playing at a reasonable level. Under hard driving the sound is a little louder, not so much of a chirp but more of an audible pressure release (air rushing), I've also noticed less backfires when shifting compared to the previous BPV I was running.

The design and style is everything I expect from CS in a product. Solid engineering and great fit and finish. 10 out of 10, would buy again.

Overall, I would say that this BPV has increase the driving experience of my car, both audible and when it comes to performance. It provides more smiles per mile, and that's a win in my book.
I have had the New CorkSport VTA BPV on my Mazdaspeed 6 and couldn’t be happier with the performance and sound. Still on the K04 turbo I am custom tuned at 20 PSI, and this BPV has an awesome response time. The dual vent is also a nice feature. During normal daily driving in traffic the BPV is quiet with it mostly venting to BP, but under high boost shift you get a very nice VTA blow off sound. Even though it is a part VTA BPV I have had zero issue running it on my custom tune that was done on the OEM BPV. Install is quick and easy, reusing the OEM BPV O-ring/Gasket is also nice and insures a good seal. If you are like me and want something that looks as good as it performs you can’t go wrong with the new CorkSport VTA BPV. I can’t wait to see how it performs on my BT 30+ PSI setup down the road.
My car is a 2010, CS stage II intake, aftermarket BPV, CS catless turboback single resonator on the midpipe, CS internals, Cobb OTS stage II 93 octane, 18.5 PSI. And for such a basic setup I wasn't expecting much from the swap of my previous valve to this one but I was shocked at the effect on the performance of the car. The 2.3 is running much more reliably in boost and fuel trims surprisingly. where my old logs showed boost waning off from 18.5 to 16.5, currently everything pegs right at the tuned presets +/- .5 psi. At VTA events, the pressure is discharged and built back up so fast that the effects on the fuel enrichment were kept within milliseconds on logs. I did notice the slightly more rich conditions in AFR upon WOT up shift, and gargling on heel toe downs. The granite solid performance was only rivaled by the acoustics of the valve. A sound for every occasion. Under part throttle and bobs between traffic felt crisp due to the quick response, accompanied by the high pitched "phhhSSHH" upon valve closing. Part throttle is just a louder version of the low boost daily scenario, with more dramatic emphasis it seamed. Where I felt this valve shined was, of course, WOT and high load. The response time and speed at which +air is discharged only seemed to make everything more responsive between revs. design wise it is compact and efficient. A very aesthetic curved design, and asymmetric etched logo are a big + as far as overall quality and looks, as well as stainless steel machine screws. The easiest thing about this whole experiment was the install, hoses off, new hose on. torque two bolts down and grin the whole time you brap around the neighborhood. 10/10 I'd do it again.
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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)

Will this need to be tuned to operate properly? Or no matter what mods you have stock or big turbo it will still be plug and play.

Asked by Jose | 11/16/2016, 05:35 PM | 1 answer(s)

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