SVTDF MAC Valve Boost Controller Kit for Fiesta ST and Focus ST

Take control of your boost with the MAC Valve Boost Control Solenoid, the go-to solution for reliable and precise turbo management on your Focus ST or Fiesta ST. The factory electronic boost control solenoid is known to become inconsistent—or fail outright—often before the 100k-mile mark. Don’t let a weak OEM solenoid hold your build back.

This high-quality MAC valve offers faster response, improved boost stability, and greater control for tuning, especially on vehicles running custom tunes, upgraded turbos, or external wastegates.

Why Upgrade?

    OEM solenoids commonly fail around ~100,000 miles

    Inconsistent boost response leads to power loss and tuning headaches

    MAC valves are trusted in motorsports for their durability and precision

Features:

  Electrical hardware compatible with Ford Focus ST & Fiesta ST

  Industry-standard 3-port MAC valve (35-series)

  Works with most aftermarket boost control strategies (including Cobb, HP Tuners, and standalone ECUs)

  Reliable performance under high-heat and high-boost conditions

  Compact and easy to install with mounting hardware available

Whether you're running a stock turbo with aggressive tuning or a full-on big turbo setup, a MAC valve is one of the smartest, most affordable upgrades you can make for consistent boost and safer power delivery.

Tune revision is required for proper operation