BOV SmartPort Dual Port Mitsubishi EVO VI-X-RedA direct fit replacement for the factory unit, the Turbosmart SmartPort BOV suits Mitsubishi EVO IV up to X. It can handle anything from stock to heavily modified vehicles with upgraded turbochargers. Benefits include Direct fit upgrade for the factory BOV on EVO IV to X Staged dual ports allow for bypass and vent to atmosphere operation in one valve Smart Port trumpet eliminates stalling and allows smooth integration with the cars factory engine