Blow Off Valve bov For Subaru WRX / STI / Forester BOV Turbo Black

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference. Get a blow-off sound WITHOUT causing stalling, backfiring, or any other BOV-related issues, even on a car with a sensitive airflow meter (MAF). Offers better throttle response, Faster boost recovery on gearshift, Unlimited boost-holding! Specification: Suitable for: For Subaru WRX (MY01 - MY07) For Subaru STI (MY01 - MY13) For Subaru Forester Petrol Turbo (2005 - 2007) Size Chart: Size: 15 * 5 * 11 cm Package Includes: 1x Vehicle Specific Bolt-On Blow Off Valve Note: *No installation Tool & No instruction is Included, Professional Installation is Recommended*