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Tial MV-R Wastegate 44mm Red w/ All Springs ( Part Number:TIA MVRR)

Tial MV-R Wastegate 44mm Red w/ All Springs - Universal

Manufacturer Part # MVRR


MSRP: $429.00

In stock! Ships same day
Qualifies for free shipping!

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A wastegate especially an external wastegate is used to find and achieve precious boost levels.

The MV-R is the replacement for the popular V44 due to the V44 being discontinued.
The center lines and flanges are identical to the V44, making this a 100% replacement piece.

The Tial MVR Wastegate features:
  • Water cooling ports (not required to run) for those heavy-duty applications, three bottom pressure ports and two top ports for boost controllers like the AMS-1000.
  • High temp NiCrFe based alloy is used for valve and 347SS valve housing will offer longer product life compared to competing designs.
  • High-temperature silicone Nomex reinforced actuator diaphragm.
  • 17-7 PH Stainless Steel actuator spring gives a consistent pressure at high temperature, resist "relaxing" at a temperature to 900F (483C).
  • Nitronic 60 Stainless Steel is used for the valve seat, and valve bushing.
  • All Stainless Steel hardware.
  • Mating weld flanges are 304L

The Tial MV-R Wastegates now comes with all of the springs so you can tune it to your cars needs without spending money on extra springs.

Sometimes springs come pre-installed from Tial so you will want to verify the spring settings before installation.
    BAR PSI SPRING COMBINATION 0.3 4.35 Red 0.4 5.80 Blue 0.5 7.25 Green + Red 0.6 8.70 Green + Blue 0.7 10.15 Black + Red 0.8 11.60 Black + Blue 0.9 13.05 Green + Red + Black 1.0 14.50 Green + Blue + Black 1.1 15.95 Yellow + Red + Black 1.2 17.40 Black + Blue + Yellow 1.3 18.85 Plain + White + Blue + Green 1.4 20.30 Plain + Black + Red + Yellow 1.5 21.75 Plain + Black + Blue + Yellow
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Brand: Tial
Color: Red
Flange Size: 44mm
Flange Type: V-Band
Includes Hardware: Yes
Includes Spring: Yes, All Springs
Material: Stainless Steel / Aluminum
Pressure Rating: 0.3-1.7 bar
Type: External
Water Cooled: Yes

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.



This product has no user uploaded media. You can upload your photo or video of your install by posting a review. Reviews:

Work of art
cbazq27146923 4 years ago
This thing is so pretty , that its almost a shame to bury it under the car. great quality part. You can tell its built good, because it is a very heavy/solid piece.

Very nice
KornShaDoW097 5 years ago
Comes on smooth and sounds aggressive once it opens up. Very nice part quality and packaging. Comes with everything you may need and isn't too hard to switch out spring on (easy w/ a vice).
Verified Purchase

guest55c54491caae52c1228b9640 5 years ago
Having a dom 5 xtr an EWG is a must and in my opinion Tial just does the best job in that regard.
Verified Purchase

Great performance, amazing sound
plumma 5 years ago
I have this setup on my cobb catless up pipe with a invidia n1 race tbe. It make the car feel so much better when on the throttle and coming off. Plus is screams when in boost. After the pro tune I gained 10whp off my stock turbo. Now I know when i enter full boost there is no way boost creep will set in. I love it!
Verified Purchase

Gordo_sti 6 years ago
This was an amazing product. I disnt even want to put it together. Lol but it does come with everything u need just in case u wanna change spring pressure. P.S.

  • Q: 2011 sti   2011sti 2 years ago


    Will be getting bigger tubro soon would it be okay to run a 44mm on a stock tubro 2011 sti with intake down pipe headers 1000cc feul pump Would like to know witch is best 38 or 44 want to know witch if the 44 would even work for the time being with stock tubro will get pro tune..??

    • A: The 38mm and 44mm are used for different applications. 38/40mm are good for - High boost - Low compression - Small displacement 44/45mm are good for - Low boost - High compression - Large displacement 38mm wastegates are more than sufficient for most Subaru builds. 44mm wastegates are generally too large and evacuate too much exhaust gas creating lag. The 38mm would be my recommendation.

      Josh P. 2 years ago
  • Q: Will this work with Tomei?  Wilk 4 years ago


    I have a pair of Tomei equal length headers that came with a proprietary uppipe and I was wondering if this woujld be compatible with my setup, and if not what do you recommend going with for an uppipe?

    • A: You will want to look into the GrimmSpeed uppipe as they make a 3 bolt uppipe to fit with this header which will allow you to do an external wastegate.

      Kyle A. 4 years ago
  • Q: 38mm vs 44mm  2012_STI_Hellaflush 4 years ago


    I have a stock 2011 subaru wrx with stock turbo,catback exhaust and I will be doing some modifications to performance on my car but still keeping the stock turbo. Which would be a better choice the 38mm or the 44mm. Thank you!

    • A: The 38mm or MV-S would be adequate for any stock turbo set ups. Thank you!

      Sterling W. 4 years ago
  • Q: Block off plate?  brandon06 4 years ago


    Would I need the block off plate to run this properly, or will the dump pipe included with the Grimmspeed up pipe be okay?

  • Q: Spring Cracking Pressure  KornShaDoW097 5 years ago


    So for each spring combo what would be an estimate cracking pressure? Ex. 10psi or 18.85psi combos.

    • A: The pressure at which the valve opens is going to be basically determined by your tuner. Whether you run a 10PSI or 12PSI spring setup if your tuner sets you up to run 20PSI then that is when the valve will crack open.

      Tanner S. 5 years ago
    • A: I am the tuner. I want to know what pressure at 0%WGDC the spring will crack open the valve. In other words, if setup for mechanical boost only, when will the spring begin diverting air?

      KornShaDoW097 5 years ago
Universal Product
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.