Application: This blow off valve has a wide range of applications, suitable for turbocharged vehicles equipped with 1 inch adapters and vehicles equipped with flow meters. Equipped with a vacuum nipple, a short vacuum tube, a jubliee clamp and a preload washer. Material: High quality materials, sturdy and reliable, stable performance. Establish compliance with standard specifications and strictly follow factory quality control to ensure excellent performance. Advantage: The top rotary valve design can adjust the spring pressure, the valve can be easily adjusted and it can be adjusted when installed on the vehicle. The valve can connect to atmospherics or recirculate or both. Easy to install: Vents directly to atmosphere creating a desirable sound. Ready to install with no mounting kit required although professional installation is recommended.