The PowerPort is Turbosmart's most significant and highest-flowing blow-off valve, resetting the flow benchmark set by our popular and highly regarded RacePort Blow Off Valve and designed to be as light as possible to keep vehicle weight down. Its cutting-edge dual-chamber design is capable of advanced control strategies. It can be held open with a solenoid to aid turbo response and control during staging to give the best possible launch for drag racing, etc.