TurboXS releases the first Hybrid Blow Off Valve designed specifically tuned for the 2008+ Subaru WRX or 2004+ Legacy GT. The valve features an innovative re-circulation and vent to atmosphere operation. It has been tuned to offer the best blend of vent to atmosphere and re-circulation without check engines lights, stumbling. Hybrid does reduce backfiring commonly associated with full vent to atmosphere Blow Off Valves, but it still can occur. This valve will bolt directly to your 2008+ WRX or 2004+ Legacy GT without the need for any additional parts.