EMS – 3-Port Mac Valve Kit for 2016-2018 Focus RS EcoBoost 2.3L

EMS – 3-Port Mac Valve Kit for 2016-2018 Focus RS EcoBoost 2.3L

Recommended for Big Turbo & High Boost Builds

The EMS 3-Port MAC Valve Kit is designed to improve boost control on the Ford Focus RS 2.3L EcoBoost, especially vehicles running upgraded turbochargers or high-boost tuning setups.

When upgrading the turbo on the Focus RS, the factory boost control system can struggle to maintain stable boost pressure. A 3-port MAC valve gives your tuner greater control over the wastegate, allowing the ECU to regulate boost pressure more accurately.

This results in more stable boost curves, improved turbo response, and smoother power delivery, which becomes increasingly important as horsepower levels increase.

For big turbo Focus RS builds, upgrading to a 3-port boost control system is strongly recommended.

Why Big Turbo Focus RS Builds Benefit From a 3-Port MAC Valve

• More precise boost control for tuned setups
• Helps prevent boost spikes with larger turbos
• Improves boost stability under heavy load
• Allows tuners greater control over boost targets
• Proven industrial-grade MAC solenoid used in motorsports applications

Boost controllers work by regulating the pressure signal sent to the turbocharger wastegate, allowing the ECU to control how much boost the turbo produces.

What’s Included

This kit includes everything needed for installation using the factory boost control solenoid mounting location.

• Genuine industrial-grade MAC 3-Port Valve
• High-temperature 1/4″ HPS vacuum line
• (4) PEX clamps
• 1/8″ NPT fitting
• Installation instructions

The kit is designed to bolt directly to the OEM BCS bracket and plug into the factory wiring harness for a clean and straightforward installation.

Fitment

2016–2018 Ford Focus RS
2.3L EcoBoost

Ideal For

• Upgraded turbo Focus RS builds
• High horsepower EcoBoost setups
• Custom tuned vehicles
• Drivers running higher boost pressure