Features: 1.Top rotating valve design can adjust the spring pressure, the valve can be easily adjusted, and it can be adjusted while being installed on the vehicle. The valve can connect to atmospheres or recirculate or both. 2.It is a perfect replacement for OEM valves that are prone to failure, and vehicles with engine management software upgrades and/ or induction fits. 3.Dumps directly into the atmospheres creating a desirable sound. Ready to install with no fitting kit required although professional fitting is recommended. 4.Equipped with vacuum nipple, short vacuum tube, jubliee clamp and preload washer. 5.A wide range of applications, suitable for turbo vehicles equipped with 1in adapters, and vehicles equipped with flow meters. Specification: Item Type: Blow Off Valve Material: Aluminum Application: Fit for Turbo vehicles with 25mm/1in adapters. Fit for vehicles with 25mm/1in connection, for vehicles with flow meters Opening Diameter: Approx. 25mm/1in Recommendation: All items should be installed by professionals. PackageList: 1 x Blow Off Valve 2 x Clamp 2 x Rubber Pipe 2 x Nozzles