Tial MV-S Wastegate 38mm Black w/ All Springs ( Part Number:TIA MVSBK)

Tial MV-S Wastegate 38mm Black w/ All Springs

Manufacturer Part # MVSBK


MSRP: $329.00

In stock! Ships same day
Qualifies for free shipping!


If you’re looking for a reliable external wastegate that has been engineered, tested, and proven to give you reliable results, then you may want to consider a Tial unit. External wategates can endure extreme temperatures, and because of these reasons, the Tial unit has been crafted from fine alloy materials to provide the user with longevity they can depend on. 

Boost can be controlled from two top ports, as well as three bottom ports.  At just 3.7” tall, the Tial 38mm MVS wastegate is one of the most compact external wastegates on the market. This Tial unit will come supplied with all the springs, and some wastegates come provided with pre-installed springs installed by Tial, so you may want to verify which springs are installed before installing this part onto your car.

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Brand: Tial
Color: Black
Flange Type: V-Band
Flanged For: 38mm
Includes Hardware: Yes
Includes Spring: Yes, All Springs
Material: Stainless Steel / Aluminum
Water Cooled: Yes
Wastegate: External

Mfgr. Warranty: Limited Lifetime Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



Tial 38mm
awdturbowrx 2 years ago
Ok first thing, the packaging was rock solid, props to Tial for that. The gate itself was a great piece and have had no issues with it at all. Only reason i gave it 4 stars is the v-band clamps they send you with are GARBAGE. Id prefer a standard v-band clamp over the weird ones that were sent. Still works great though.
Verified Purchase

LOLFUNCTION 3 years ago
Hands down my favorite performance mod ever to either of my subies. I absolutely love loudness, when my P&L quadtip and catless DP didn't satisfy me anymore this did the job. Puts a huge smile on my face every time this thing opens and I find myself giggling like a schoolgirl, I stuck with a EBCS because I like the sound of wastegate flutter rather than just open or closed you get with a hybrid MBCS setup
Verified Purchase

Quality part
2011WRXfan 3 years ago
Installed the EWG with the Grimmspeed up-pipe in a couple of hours (drive on ramps aid in ease of access). Had the car tuned and it rockets to redline and max boost! Yes, this sound like you're taking off in a rocket, but potential threats will most likely wet themselves before messing with you!
Verified Purchase

2 weeks wg
macarong1988200581739 4 years ago
bought 2 of them, couple times of two step and the wg went bad, leaking and i thought it was my fault till took the car to the shop, wg is leaking.

Worth it
Hellchaser 4 years ago
I needs an EWG since my boost creep couldn't be tuned out in my 5th & 6th gears so I added this onto my GrimmSpeed up pipe and had it retuned along with a few other mods. I love the scream it makes when I go full throttle & I have no worries of over boosting. I build & hold boost better. If you don't like loud I'd suggest you reroute the dump tube back into your down pipe. I installed it my self in less than an hour with a jack, & simple hand tools.

  • Q: Spring sizes  noeldiazd 26 days ago


    So what's the difference in spring sizes what do they do? I will be going flex fuel along with headers downpipe and catback, 14psi spring ok? What do these springs do?

    • A: Essentially the springs regulate what boost pressure you will run if no boost controller is implemented. The spring pressure is relative to what PSI you want to run. A 14 PSI spring is going to work well for you if you want to run more than 14 PSI with the utilization of a EBCS( Electronic Boost Control Solenoid) or a manual boost controller.

      Jared A. 25 days ago
  • Q: Tial 38mm wastegate  Iker bermudez 6 months ago


    I have an invidia upipe and a stock turbo, my car is not boosting all the way stops pushing around 11lbs , could it be the wastegate not opening? And also will this fit with the indvidia up pipe?

    • A: From what it sounds like is that your wastegate is only running wastegate pressure I would check all of the vacuum lines and boost lines.

      Jared A. 6 months ago
  • Q:   kyronlankford4 10 months ago


    Will this fit my 2004 wrx stock turbo if not what items will I need to make it fit?

    • A: You will need an uppipe with an external wastegate flange (like what Grimmspeed offers). You will also need a bracket to block off your stock internal wastegate. Keep in mind that you will also need a custom tune to run an external wastegate setup.

      Josh P. 10 months ago
  • Q: 2006 LGT  Sheepdog 1 year ago


    Will this fit on a stock turbo for a 2006 LGT?

    • A: This will not fit on the OEM turbocharger. OEM Subaru turbos use an internal wastegate. To use this you will need an uppipe with an external wastegate flange and other accessories.

      Nick S. 1 year ago
  • Q: Second tune?   travisallen948 1 year ago


    If I have a pro tune on 20 psi would I need another tune after adding an EWG

    • A: Yes, an EWG will require a tune.

      Brady R 1 year ago
Universal Product
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.