Features: 1.Fit for 1.8T and the 2.7L engines of specific vehicles, also can work on other car with 1in inner and outer diameter. 2.Precise splitter valve, offers blow off and recirculation valve operation all at the same time. 3.Designed for many turbo engined applications that operate metered airflow management systems. 4.Get all the noise of the BOV while retaining the compatibility with the recirculation needs of the engine management system. 5.It can be adjusted to fit your engine, also can be converted to be totally recirculating if you need a stealthy approach. Specification: Condition: 100% Brand New Item Type: Blow Off Valve Material: Aluminum Color: Silver Model: BOV1022 The Valve is capable of 3 different setups: 1. Hybrid: Atmospheric AND Re -circulating Operation 2. 100% Re-Circulating Mode 3. 100% Atmospheric Mode Instruction: Precise adjustment of the splitter hybrid valve is done by turning the ratchet type cap adjustment knob located on the top of the valve. Turning the knob clockwise will stiffen the spring for higher levels of boost retention, while turning the knob counter-clockwise will loosen the spring tension for lower levels of boost retention. Fitment: Fit for 1.8T engine Fit for 2.7L twin-turbo engine (2.7L engine requires 2 BOV per vehicle) This is specially designed for 1.8T and 2.7L engines of specific vehicle. It is also suitable for other car with an inner and outer diameter of 25mm/1in