BOV Dual Port Uni 32mm-BlackBOV Dual Port Uni 32mm Black The BOV Dual Port Uni 32mm Black is a genuine Turbosmart blow off valve engineered to improve boost response, throttle lift control and reliability in high performance turbo applications. This product is supplied with the technical notes: Fitment Requires Fabrication Universal Product. Four BOVs in one. Suits medium sized turbocharger systems on 4 to 6 cylinder engines developing 200 to 600 HP. The Dual Port can be