Genuine TiAL Sport Q BOV is the first revision of the original TiAL blow off valve. The Q bolts up to any standard TiAL flange, no re-welding. This is the highest flowing BOV on the market and is offered with a variety of springs for different vacuum levels and a special spring specifically for supercharged vehicles. This TiAL BOV is available in all 5 colors- silver, red, blue, purple and black.
 
 
What Spring Pressure Do I Need?
The spring pressure is determined by your vacuum at idle. It is not related to how much boost you want to run. Check what your vacuum is at idle and select the matching spring.

• 2 PSI (For Supercharger Only)
• 6 PSI (-8 to -11 in/Hg)
• 8 PSI (-12 to -15 in/Hg)
• 10 PSI (-16 to -19 in/Hg)
• 11 PSI (-20 to -21 in/Hg
• 12 PSI (-22 to -24 in/Hg)