GReddy Type RS Blow Off Valve

The BOV is easily adjustable to eliminate compressor surge and preventing premature boost leakage, while increasing boost response between shifts. Each valve is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the three different sizes give the GReddy user the option to match vehicles with mild upgrades to heavily tuned engines.


  • Eliminates compressor surge
  • Increase boost response between shifts
  • Protects turbo when downshifting
  • Variable valve opening
  • Durable anodized cast billet aluminum frame
  • Recommend for 100-400 whp
  • Universal Fitment

HKS Super SSQV Generation 4 Blow Off Valve

The HKS Super SQV IV (Super Sequential Blow Off Valve) has been designed for strength and durability, featuring a high quality aluminium die-cast body, high rigidity metal die-cast valve. The HKS SSQV IV retains the well known unique high frequency sound that can be further tuned with the special fins available.

The HKS SSQV IV features a unique sequential valve structure, with a primarily and secondary valve system, providing the perfect amount of pressure relief at a wide range of boost levels.

  • Latest release from HKS Japan in April 2011
  • High quality aluminium die-cast body with silver paint
  • High rigidity metal die-vast valve section to ensure long lasting durability
  • Triple fin for unique high frequency sound.