Four BOVs in one. The Dual Port can be configured as a Supersonic, Megasonic, Plumb Back or Dual Port! Features sequential ports for quiet operation on mild boost and full performance at full boost. With a Quick release V-Band clamp, tool-free adjustment and all the parts needed for conversions included, it is Turbosmart's most versatile BOV. Easy to install and setup, the Turbosmart Dual Port BOV features sequential ports for quiet operation on mild boost and full performance at full boost. Suits medium-sized turbocharger systems on 4 to 6-cylinder engines developing 200 to 600 HP. Universal