HKS Super SQV4 Blow Off Valve + Return Plumbing KitThis HKS kit includes the HKS Super SQV4 Blow Off Valve (71008 KH012) and the HKS Super SQV4 Return Plumbing Kit (71008 AH012V). Purpose built for the FL5 Civic Type R, this blow off valve system delivers sharp throttle response, smooth boost control, and a clean, powerful sound throughout the rev range. Its relief less design optimizes pressure management for both aggressive driving and everyday use, maintaining consistent performance in all