Engine Performance Accessories For Sale Intakes, Intercoolers, Tuners Turbosmart Blow Off Valve Smart Port Dual Port Mitsubishi EVO IV to X Find TurboSmart Blow Off Valve BOV Dual Port Red for Mitsubishi Evo VI Mitsubishi Lancer Evo 10 HKS Super SQV4 Blow Off Valve Zerbracing.com. A direct fit replacement for the factory unit, the Turbosmart Smart Port BOV suits Mitsubishi EVO IV all way up to X. It is capable of handling 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 mapping A Milspec, lightweight, aluminium piston providing excellent valve response and prolonged piston life All billet CNC construction and attractive anodized finish Manufactured, assembled and validated in house at Turbosmart HQ Supplied with: Port Blanking plug so you can switch to fully bypass if you want to Red Spring rated to 17 to 14 InHg (installed) Detailed fitting instructions Smart Port Technology The Smart Port is an innovative Blow Off Valve, combining advanced design with precision CNC machined billet components. The valve works by using two staged ports and a one way valve on the trumpet outlet. This enables the Smart Port BOV to work like both a bypass AND vent to atmosphere valve in one, while also eliminating stalling and significantly reducing the chances of low speed compressor surge. In addition to this, the Smart Ports unique lightweight piston is made from aerospace alloy with a military spec coating, resulting in quicker valve response, better sealing and superior durability. IMPORTANT EMISSIONS NOTE: This product does not have a CARB EO #; it is not legal for sale or use in CA on pollution controlled motor vehicles. This is intended as a "Race Only" product to be used solely for competition. It's use is limited to closed course and open course racing that is formally sanctioned by a recognized racing organization; any other use including recreational off road use, may be a violation of local, state and federal laws. It is the buyer's responsibility to verify legal use of this product for the intended application and use.