Aluminum Alloy Blow Off Valve S Diverter Turbo BOV Boost Fit For Volkswagen GTI Jetta Fit For Audi 1.8T 2.7T. The Splitter valve is a remarkable valve that gives a combination of blow off and recirculation valve operation all at the same time and has been specifically designed for the many turbo engined applications that operate metered airflow management systems. This means you get all the noise of the blow off valve whilst retaining the compatibility with the recirculation requirements of the engine management system. The blow off valve adapter creates an appealing atmospheric blow-off valve sound and improves turbo engine operation. The Turbocharger bypass diverter valve is made from a plastic and metal blend, boasting wear resistance and structural stability for long-term application., Manufacturer: VNSMM