HKS SSQV4 Blow Off Valve Suction Return Kit for Honda Civic Type R FL5 2023+By using this suction return kit in conjunction with the Super SQV kit, it is possible to achieve suction return in the same way as the genuine air bypass valve, making it vehicle inspection compliant. The sharp exhaust sound that occurs when the engine is released to the atmosphere will no longer be heard, but the sound of backflow from the air cleaner will become easier to hear. Note: Blow off valve is not included and sold separately.