Description: A new generation of "Push Type Floating Valve System Blow Off Valves". The Floating Valve design produces quicker valve response, increased valve travel, and improved resistance to premature valve lift and boost leak. The floating valve design incorporates a revised adjustable spring system and diaphragm ventilatio, while maintaining the advantages of heat resistant silicone diaphragm and valve ratio. This allows the spring and diaphragm to control the valve and boost better. By placing the spring over the valve, it makes the need for spring pre-load less dependent on idle and light boost situations and more on keeping the valve closed under boost. Another improvement includes an adjustable turning top hat to adjust the hose fitting location without complete dis-assembly. This BOV can be configured to one of four working modes - , atmospheric, plumb back. Specification: Fitment: for MY01-MY07 for STi MY01-15 for Forester 05-07 Package Includes: Blocking Gasket Note: Please check your item model brfore purchasing to make sure it fits perfectly. Please contact us firstly if there are any problems with the product. The item's color may be slightly different from the pictures due to the light and screen setting difference. Please allow slight dimension error due to manual measurement.Thanks for your kindly understanding.