Quick view MAC 3 Port MAC Boost Control Valve Suitable for most turbo and supercharged applications, works with many ECU manufactures like Octtane, Fueltech, Haltech, Racetec, AEM, Hondata just to name a few. Fetures: 3 port solenoids, this is the most common method to control Boost. 4 Port also... MSRP: Was: Now: $39.98