The standard type of dump valve fitted to most production turbocharged vehicles is only usually adequate in its operation. Due to the constraints of production vehicles, the standard valves have to operate quietly, and be inexpensive to manufacture. In addition to this, the valves are generally designed as re-circulating valves, which further reduces their efficiency.
HKS Super Sequential Blow-Off Valves are CNC machined from billet aluminium, and designed to give quick valve response. The HKS valve will vent directly to atmosphere, but are designed to close at idle. This will prevent un-metered air being drawn into the engine via the valve, causing erratic running problems. HKS Super Sequential Blow-Off Valves are designed specifically for each vehicle type. They will therefore fit as a direct replacement for the original valve.
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