Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
HKS SUPER SQV4 Black Edition is a blow-off valve intended for turbocharged Subaru WRX STI applications using EJ20/EJ25 engines (GDB series). It provides fast pressure dump characteristics to protect the turbo system and contributes a pronounced release sound on throttle lift. The SQV4 design focuses on responsiveness and durability for demanding forced-induction use when paired with appropriate boost plumbing and installation.
HKS SUPER SQV4 Black Edition GDB EJ205/ EJ255/ EJ257
