HKS Super SQV4 is a sequential pull-type blow-off valve for the Subaru WRX / WRX STI VMG / VM4 chassis with the FA20 turbo engine. This is the return-kit version, supplying the recirculation (plumb-back) tube and model-specific adapter so vented air routes back into the intake, keeping idle clean and protecting against compressor surge. The two-stage piston gives a sharp release and quick recovery.
Specifications
| Type | Sequential blow-off valve with return kit (Super SQV4) |
| Fitment | Subaru WRX / WRX STI VMG / VM4 - FA20 |
| Venting | Recirculating (return kit included) |
| Includes | SQV4 valve, recirculation return tube and vehicle-specific adapter |
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