Extreme Turbo Systems

TIAL Q 50mm Blow Off Valve

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  • Regular price $250.00


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Q is the first revision of the original TiAL BOV. The Q bolts up to any standard TiAL flange, no re-welding.  This is the highest flowing BOV on the market.  It's offered with a variety of springs for different vacuum levels and a special spring specifically for supercharged vehicles



  • For use on turbo-charged and super-charged applications (Paxton, Vortec, etc.). The body and all internal components are CNC-machined from 6061 aluminum alloy. It features a large 1.98 in (50.5mm) valve.
  • The V-Band design aluminum mounting clamp gives a very clean and unique appearance. The clamp uses Stainless Steel hardware for a long lasting, corrosion-free appearance.
  • The valve seal utilizes a Viton O-ring that is clamped in place to prevent the possibility of sticking to the seat and pulling out. The valve stem and guide are Teflon-lubricated, hard anodize-coated for wear resistance.
  • The Blow Off Valve also comes with our own machined aluminum banjo-type air fitting and bolt, with over sized 10mm hose barb for quick actuator response. The actuator has a high temp silicone Nomex-reinforced diaphragm for long life.
  • An aluminum or mild steel weld base mounting flange is furnished with each unit. Stainless Steel is available at an additional cost. The use of 6061 aluminum allows the housing to be anodized with a selection of colors.
  • Through countless hours of R&D we were able to make the same size valve flow a staggering 60% more than the original design - that means 60% more air is blown off per cycle! This is the highest flowing BOV on the market.
  • Color anodized aluminum options (Silver, Red, Blue, Purple, Black).
  • A single Q BOV can support up to 1,800hp
  • -2psi spring for supercharged applications

Customer Reviews

Based on 4 reviews
Robert Borowicz
Tial q 50mm


Jose Vazquez

TIAL Q 50mm Blow Off Valve

James Swanson

Amazing blow off valve. I got it a few days faster than I anticipated. The packaging was legit and the b.o.v. looks awesome.

Derrick Garcia

Fast shipping



Ask a Question
  • Does it fit my 2015 gtr do I need to do anything else with it

    This will depend on your intercooler piping.  You will need blow off valve adapters if you're running factory uppers.   If you plan on buying an intercooler kit from us and select TiAL BOV Flanges these will be plug and play.  If you need the adapters please email sales@extremeturbosystems.com



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