Universal sequential membrane Blow-Off Valve (BOV) HKS SSQV 4. It uses a double membrane that ensures high speed and accuracy. Original, made in Japan.

At a lower pressure only opening a small membrane (up to 0.2 - 0.5 bar), at a higher pressure (0,5-2,5bar) opening both membranes simultaneously.

Continuous adjustment of the blow off pressure can be reached by a screw in the rear part of the valve.  

BOV is only suitable for turbocharged engines.

Reduces the turbo hole, protects the turbo and creates a sound effect.

HKS is a leading manufacturer of motorsport and tuning parts.

They offer a wide range of professional and simple tuning products. 

Their products are manufactured in Japan with emphasis on quality and safety standards. HKS offers the finest tuning products for a unique driving experience.