Vehicle Specific Application


Greddy to HKS Blow Off Valve Adapter

Brand new product from Treadstone is our Greddy to HKS blow off valve adapter. Great for switching to the awesome HKS blow off valve for its unique sound! Bolts up to any Greddy or Turbonetics Raptor BOV flange. Made from cast aluminum.


HKS Blow off Valve Flanges and Adapters

HKS adapters CNC aluminum, used for connecting an HKS blow off valve to a hose end found on many OEM turbo applications.


HKS BOV Adapter Flange for Subaru WRX & STI

Adapter flange to bolt HKS BOV onto stock location on Subaru WRX/STI intercooler. All mounting hardware included to mount and vent HKS to open atmosphere.


HKS Steel and Aluminum Weld Flanges

Used to mount any HKS blow of valve to a pipe, comes in aluminum and steel. Bottom is beveled to ease welding on to a round pipe.


Recirculation Adapter for HKS SSQ BOV outlet

Machined aluminum adapter to attach to the outlet port on the HKS Super Sequential Blow Off Valve and turns the BOV into a recirculated valve with 1.25" or 1" diameter outlet. Replaces the stock atmospheric vent that comes stock on an HKS SSQ BOV. Second most common out size for stock replacement (next to 1"). 1.25" fits applications like EVO, etc. 1" Fits VW, Audi, Porsche...


HKS SSQV 4 Blow Off Valve 71008-AK001

In 1994, HKS introduced the first Sequential Blow-Off Valve featuring a unique, pull-type, sequential valve structure and a differential pressure control system. This advanced pull-type relief system allowed for stable operating ranges from low to high boost pressures. 71008-AK001


HKS SSQV Blow Off Valve - Limited Edition Gun Metal

This limited edition gunmetal HKS SSQV Blow Off Valve uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low boost to high boost. Its Pull-Type relief design ensures stable operation regardless of the amount of boost pressure. The Super SQV will support new generations of turbocharged vehicles.


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