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Mountune USA

mountune Optimized Accessport Calibration - Focus ST

mountune Optimized Accessport Calibration - Focus ST


Regular price $99.00
Regular price $99.00 Sale price $99.00
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Renew and maximize the performance of your Focus ST. The mountune Optimized Accessport Calibration is built to your specifications based on your vehicle type, modifications, and octane. Mountune Optimized calibrations go beyond the standard OTS files included with the Accessport and do not require any data logging.


This product is intended for competition/track use only.
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Mountune Performance Calibration Slot Assignments

The mountune calibrations include 4 slots that are switchable at any time, on the fly, by simply pushing a few buttons. This is a very convenient feature that can be further adjusted in many cases. The default settings for the Focus ST are laid out as such:

Slot 1 Standard high-performance calibration
Slot 2 Standard high-performance calibration with indicated Launch Control and Flat Foot Shifting**
Slot 3 Low boost performance calibration
Slot 4 Same as Slot 1 with LESS spark (aka panic mode / bad fuel mode)

** Launch control & flat foot shifting can be adjusted anytime via the Accessport. By default, launch control is set at 2400 RPM and flat foot shifting is set at 4000 RPM.


Ford Focus ST with mountune ECU calibration compared to the stock ECU calibration.


Please Note: This offer is not a custom tuning service and is not available for turbocharger upgrades, engine swaps, high-pressure fuel pumps, non-factory injectors, high-flow/catless downpipes, nitrous oxide, and other specialty fuel applications. This service is non-transferable and other restrictions may apply.

Return Policy

You have 7 calendar days to return an item from the date you received it. To be eligible for a return, your item must be unused and in the same condition that you received it. Your item must be sealed in the original packaging. Your item needs to have a receipt or proof of purchase. Some exclusions apply.

For additional details see our Return & Refund Policy.

Installation Guides

To see all available installation and break-in instructions, click here.

Disclaimers & Legal

This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.

Click Here for emissions compliance information.

California Residents Prop 65 Information
California’s Proposition 65 entitles California consumers to special warnings for products that contain chemicals known to the state of California to cause cancer and birth defects or other reproductive harm if those products expose consumers to such chemicals above certain threshold levels. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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