... quality blow off valve Universal SQV SSQV 4 IV BOV Turbo Blow Off ValveFor ALL Turbocharged HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve ... be purchased separately for sound tuning.Package Includes:1 x Blow Off Valve SQV 41 x 2.5'' Flange AdaptorInstallation Parts (Exactly ... , Honda Civic,Acura Integra,Dodge Neon SRT-4 / SRT4,Mazda RX7 / RX-7, RX8 / RX-8,Nissan Skyline GTR / ...