The Turbosmart Kompact Dual Port 34mm blow-off valve vents both to atmosphere and back into the intake, using sequential timing of ports for quieter operation in everyday driving while preserving the vent-to-atmosphere benefits under race conditions. The design is convertible: supplied port blanking plugs allow easy change to a complete atmospheric or full bypass configuration, giving tunable behavior for different driving demands.
Turbosmart BOV Kompact Dual Port-34mm