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Tial Q Blow Off Valve 11 Psi Spring Red ( Part Number:TIA Q.11R)

Tial Q Blow Off Valve 11 Psi Spring Red - Universal

Manufacturer Part # Q.11R


MSRP: $308.00

In stock! Ships same day
Qualifies for free shipping!


RallySport Direct is proud to carry some of the best aftermarket turbocharged components brought to you by Tial.

On this page, you are looking at the Tial Q Blow Off Valve. This blow-off valve delivers in performance for vehicles from mid to high horsepower levels to relieve boost.

Here are the details:

  • Flows 60% more than the original design
  • One of the best performing valves on the market
  • Retains the same flange as the original version
  • Red finish
  • Includes V-band clamp, weld-on flange, and vacuum banjo fittings
  • 11 psi spring

The spring pressure in the valve does not correlate with the amount of boost pressure you want to run. The size spring you need is determined by your engine vacuum at idle. Please refer to the charge below to select the right pressure for you.


ENGINE VACUUM READING SPRING COLOR SPRING RATE -22 and -23 in/Hg Brown -12 PSI (-24 in/Hg) -20 and -21 in/Hg Yellow -11 PSI (-22 in/Hg) -16 and -19 in/Hg Un-painted -10 PSI (-20 in/Hg) -12 and -15 in/Hg White -8 PSI (-16 in/Hg) -8 and -11 in/Hg Black -6 PSI (-12 in/Hg)
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Brand: Tial
Adjustable: No
Color: Red
Design: Diaphragm
OEM Replacement: No
QTY: 1
Valve Type: Atmospheric
Includes Gasket(s): No

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.


  • Q: BOV  dc2h2b 8 months ago


    I'm running a mishimoto fmic setup on my 06 Sti. I would like to purchase this bov. Which flange that you guys have will work on my setup? Please lmk thanks

    • A: You will need a new flange but it depends on what size you need. I would measure the flange right now and compare it to the ones we have:

      Tyler A. 8 months ago
    • A: You will need a new flange but it depends on what size you need. I would measure the flange right now and compare it to the ones we have:

      Tyler A. 8 months ago
  • Q: 04 WRX fitment and Surge/flutter noise  tavo7 3 years ago


    The reason I am interested in this BOV is because ive hear them on others cars and they make this amazing flutter/surging noise and thats what i want. Is this the right BOV for that? I am also running a TMIC

    • A: This is a fully atmospheric valve and it will have a loud vent noise. This is a universal fitment so you will either have to weld a flange onto your intercooler or purchase an adapter.

      Nick S. 3 years ago
  • Q: fitment  Subie05 3 years ago


    Do I need a flange to run this on a front mount?

    • A: Most front mounts using a stock BOV flange will require a flange to be welded on for the Tial or an adapter.

      Nick S. 3 years ago
  • Q: Fitment   Jmart24 3 years ago


    I'm interested in buying this for my car but I run a TMIC its a Subaru WRX, I'm not 100% if this type of bov can be used with a top mount if you can please help? Thanks!

    • A: It will however, it will require a customer flange will be required to work with your OEM flange.

      guest57853c642a8d25b5018c44a7 3 years ago
  • Q: Fit  rsubi24 5 years ago


    Does it fit to a 2012 STi???

    • A: This is a universal product, and to fit on your car would require a custom flange.

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