Tial Sport Q Blow Off Valve 50mm - WITH FLASH TUNE


Please Choose:

Add to Cart:

Free shipping within the continental USA!

Stratified Notes:

Installing an aftermarket BOV is a good idea when increasing the boost or airflow entering your motor. The Tial Q BOV can hold very high boost pressures and release pressure quickly (50mm valve) and accurately to prevent surge. Most OEM stock valves are plastic and are designed to work at stock boost and airflow levels. Running the OEM by-pass-valve on modified engines becomes inadequate and these valves tend to leak and can't release pressure quickly enough. The result is simple: power loss. 

We include the 6 psi spring as it offers the best balance, but if you prefer a different one, please let us know in the notes during checkout.

To ensure you get the most from your new BOV we include a $50 credit towards a Stratified Flash Tune with this purchase.



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
  • Pipe Size: Flange Cut for 2.5" pipe
  • Spring Pressures (psi) : -2(S/C), -6, -8, -10 ,-11 ,-12
**If order needs to be shipped outside of the USA, additional shipping charges will be calculated and added after the purchase**






  • Model: Tial_Q.6
  • Shipping Weight: 0.8kgs
  • 99 Units in Stock

This product was added to our catalog on Monday 27 July, 2015.