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Tial Q Blow Off Valve 11 Psi Spring Blue - Universal

$265.00 $314.16

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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

Blue 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)

Please verify compatibility before purchase. May require some modification for proper installation.

This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to