Turbosmart BOV Kompact Dual Port-20mm - TS-0203-1021Part Number: TS 0203 1021 Dual outlet type BOV. Dual Port vents both to the atmosphere and back into the air intake. Ports with sequential timing allow quieter operation during everyday driving while getting all the benefits of a vent to atmosphere BOV under race conditions. They are easily converted to an entire atmospheric or full bypass unit using supplied port blanking plug. SUPPLIED WITH Port Blanking Plug Pink Spring Rated 24 to 14 InHg