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COBB Accessport V3 ECU Flasher Ford Focus ST 2013-2018 B3 Package
COBB Accessport V3 ECU Flasher Ford Focus ST 2013-2018 B3 Package

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Sale price:$1,429.00
Savings: $606.00

Availability: Usually Ships in 24 Hours
Product Code: AP3-FOR-001B3

Downpipe Type :

Engine Idle Speed :

Flat Foot Shifting :

Fuel Octane / Type:

Launch Control :

Shift Assist :

Sound Symposer :

Turbocharger Bypass Valve :

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COBB Accessport V3 ECU Flasher Ford Focus ST 2013-2018 B3 Package


COBB Accessport V3 ECU Flasher Ford Focus ST 2013-2017 with mountune Low Restriction Intake and Intercooler Upgrade and mountune Engine Roll Restrictor.


  • COBB Accessport V3
  • mountune Low Restriction Intake
  • mountune Black Intercooler Upgrade
  • mountune Roll Restrictor
  • mountune Custom Calibration
  • mountune Badge

The mountune Focus ST B3 upgrade package includes the very best components to enhance the performance of your Focus ST including custom calibration to optimize the performance of your car based on your specific use and build specification. mountune performance calibrations are proven to extract the maximum performance from the Focus ST and the mountune B3 package brings together the essential pieces to get you going.

The Accessport is the industry leading OEM ECU flashing, managing and monitoring assistant. Unlock power hidden within the ECU by replacing conservative factory settings with more aggressive calibrations. The standard Cobb Accessport from mountune USA includes all of the standard Cobb calibrations along with a custom mountune calibration* built to your specifications based on your modifications, octane, and preferences. The results are impressive gains in torque and horsepower with incredible custom features that can be adjusted to meet your requirements. With over 15 years of Ford 4 cylinder ECU calibration experience it's no surprise that mountune USA are partners with Team O'Neil Motorsports, LaRoza Racing, and O.D.D. Racing. And with multiple Rally America Championships won using mountune USA custom calibrations, our programming team has more Focus ST tuning experience than any other source available to you.

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
  • Slot 3 - Low boost performance calibration
  • Slot 4 - Same as slot 1 with LESS spark (aka panic mode / bad fuel mode)

Maximize the performance of your Focus ST

For those who require additional support, the mountune ECU calibration can be optimized further with data logging and program revisions at no extra charge. Engine performance is enhanced by reviewing data logging files along with calibration revisions based on feedback from the end user. The duration of the calibration and file revision period is 45 days from the time the first file is sent to the customer. Multiple calibrations can also be requested during this time period. Once the 45 day period has expired the custom calibration period ends. Future custom calibrations are subject to additional fees depending on the exact nature of the request. mountune optimized Accessport calibrations are available only to customers that have purchased the Cobb Accessport directly from mountune. Custom programming options include, but are not limited to: MAP (slot) switching, Launch Control settings, Flat Foot Shifting settings, Ethanol (E30 & E40) support, 100+ Octane support, Gear Based Torque Limiting, Shift Assist, Sound Symposer, Idle Adjustment, Rev Limiters, Shift Light settings, and Advanced Wastegate Adjustments. *Please note this free offer for calibration optimization is not available for turbocharger upgrades, engine swaps, or nitrous oxide applications and applies to the original purchaser only. This service is nontransferable and other restrictions may apply. If you have questions about our mountune calibrations please do not hesitate to contact us directly at (714) 424-9400 or at usa@mountune.com

Ford Focus ST with mountune ECU calibration.


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.

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Average Rating: 5 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
Best bang for the buck February 12, 2017
Reviewer: @dankwise_ from Escondido , CA United States  
This baby opens up a whole new world for focus st owners. Single most important upgrade besides motor mount imo.

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  1 of 1 people found the following review helpful:
One Happy Customer! July 27, 2016
Reviewer: Doug Brown from Corbin, KY United States  
Installed the complete B3 package within  5/6hrs. Would of took a lot less time if it wasn't for the hard to follow instructions  for the intercooler. The instruction don't tell you what bolts to use,  where they go, nor do they have an tq spec. This was the main reason why it took me  awhile to figure out what bolt goes where. The heavy duty motor mount fitted like a glove and the instruction had tq spec, so it was super easy yo install. The low restriction air intake was also very easy to install and the instruction were good. The Cobb AP came preloaded with Cobb's stage maps and a custom Mountune  tune. Cobb's stage 1 and 2 were very good but nothing compared to the custom Mountune tune. The Mountune tune pulled harder and the car was more responsive. This was a great experience for me(minus the intercooler instructions) and I highly recommend their products.

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