EMS 2016-2018 Ford Focus RS EcoBoost 2.3L 3-Port Mac Valve Kit
Industrial-grade MAC 3-port boost control valve kit for the 2016-2018 Focus RS. Gives your tuner real authority over wastegate duty cycle — steadier boost, fewer spikes, sharper response on upgraded turbos. Bolts to the OEM BCS bracket and plugs into the factory harness.
or as low as $9.17/mo with Affirm
3-Port MAC Valve Kit
Industrial-grade boost control for the 2016–2018 Ford Focus RS 2.3L EcoBoost. Once you go past the factory turbo, the stock boost control solenoid runs out of authority — this hands it back to your tuner.
Why A Big Turbo Focus RS Wants This
The factory boost control solenoid was never asked to manage the pressure signal a larger-frame turbo throws at it. The result is boost that spikes where you do not want it and wanders where you need it flat. A 3-port MAC valve regulates the signal going to the wastegate with far more resolution, which gives your tuner real authority over the boost curve instead of fighting the factory hardware.
What Is In The Kit
Specifications
| Spec | Detail |
|---|---|
| Valve type | Industrial-grade MAC 3-port boost control solenoid |
| Vacuum line | HPS high-temperature, 1/4 in. |
| Fitting | 1/8 in. NPT |
| Mounting | OEM boost control solenoid bracket — no cutting or adapters |
| Wiring | Plugs into the factory harness |
| Fitment | 2016–2018 Ford Focus RS 2.3L EcoBoost |
A 3-port valve changes how the ECU controls the wastegate. It needs to be configured by your tuner — fitting it without a matching calibration will not improve boost control on its own.
Best suited to upgraded turbo Focus RS builds, high horsepower EcoBoost setups, custom tuned vehicles, and anyone running higher boost than stock.
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