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COBB Accessport V3 ECU Flasher - Ford Focus RS B3 Package
COBB Accessport V3 ECU Flasher - Ford Focus RS B3 Package

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Sale price:$1,229.00
Savings: $308.00

Availability: Usually Ships in 24 to 48 Hours
Product Code: AP3-FOR-004B3

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Focus RS 2016
Focus RS 2017
Focus RS 2018

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Ford Focus RS B3 Package

  • COBB Accessport V3
  • mountune Custom Calibration
  • mountune High Flow Intake (optional colors)
  • mountune Uprated Air Recirculation Valve
  • mountune Roll Restrictor
  • mountune Badge

The mountune Focus RS B upgrade package includes the very best components to enhance and optimize the performance of your Focus RS including custom ECU 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 reliable performance and the mountune B series upgrade packages bring together the essential pieces to get you going.

We rely on the industry’s best tuning/flashing device, the COBB Accessport, to deliver our proven ECU calibrations. The Accessport coupled with mountune’s custom performance calibration, unlocks power hidden within the factory ECU calibration by replacing conservative factory settings with more aggressive calibrations. The COBB Accessport from mountune USA includes all of the standard COBB OTS (off the shelf) 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. Our team has spent countless hours on the dyno and track developing performance upgrades that perform in a wide range of applications. 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 RS tuning experience than any other source available to you. Choose from one of the many upgrade packages to enhance your Focus RS.

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 RS 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)

Maximize the performance of your Focus RS

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 for the chosen fuel type / octane is 45 days from the time the first file is sent to the customer, which is preloaded onto the AP when it ships out. Multiple calibrations can also be requested during this time period. Once the 45 day period has expired the free 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 who have purchased the Cobb Accessport directly from mountune.

Custom programming options include, but are not limited to:

  • On-the-Fly MAP (slot) switching
  • Auto Start / Stop disabling
  • Launch Control settings**
  • Flat Foot Shifting settings**
  • Ethanol (E30 & E40) support
  • 100+ Octane support
  • Gear Based Torque Limiting
  • Shift Assist settings
  • Exhaust burble settings
  • Exhaust valve settings
  • Idle Adjustment
  • Rev Limiters
  • Speed Limiters
  • Shift Light settings
  • Advanced Wastegate Adjustments
  • Low Traction / Wet Weather settings

*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 non-transferable and other restrictions may apply. If you have questions about our mountune ECU calibrations please do not hesitate to contact us directly at (714) 424-9400 or at usa@mountune.com for more information.

**Launch control & flat foot shifting can be adjusted anytime via the Accessport. By default launch control is set at 5250 RPM and flat foot shifting is set at 5000 RPM.

Ford Focus RS with mountune High Flow Induction Kit. Green dyno run has aforementioned parts installed with stock ECU calibration. Red dyno run has aforementioned parts installed with mountune USA custom 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.

Read about the Focus RS tuner B3 Package on Jalopnik.
Mountune ECU calibration and hard parts reviewed
Mountune powered Team O'Neil Focus RS Mt. Washington Hillclimb
The Smoking Tire takes Mountune equipped Focus RS on the track

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Average Rating: 4.5 of 5 Total Reviews: 17 Write a review »

  0 of 0 people found the following review helpful:
Get your AP from Mountune August 6, 2019
Reviewer: Taylor Pujals from Long Beach, NY  
Started off my RS with the B3 package from Mountune, and purchased my tune from stratified.
Previously being a stratified fan for my Fiesta ST, I knew their RS tune would be a linear, safe, stronger-then-stock map, which it certainly is. However, it died quickly upstairs and I didn't like the way 1st gear aggressively pulled.
Since Mountune's B3 pack came with a calibration, I worked with Randy to dial in his 91&93 pump tune. Immediately the ignition timings were cleaner, fuel efficiency was +1 mpg, the power band pulled further. It felt healthier, like the car was breathing better. I was convinced by Randy to go one step further for E40, which I'm running today. TLDR: If you have access to E85 and mixing at the pump doesn't bother you, I strongly recommend working with Randy Robles towards E30 or E40 options.

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  0 of 0 people found the following review helpful:
Exactly what I was looking for and more... July 30, 2019
Reviewer: Nick Brownfield from Warrensburg, IL United States  
I decided to pull the trigger and go with this B3 package (and a few other goodies) from Mountune. I could NOT have been more impressed with this kit. The production of each part was top notch. Fitment could not have been better, either. Also, the e-tuning with Randy was super easy and haven't had a single issue on this car which is my daily driver. Randy and every body else with Mountune were able to answer every one of my questions and helped sort out what I needed when I ran into a snag. I highly recommend this kit if you want more for your RS.

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  0 of 0 people found the following review helpful:
Still waiting November 28, 2018
Reviewer: Eric Przyuski from Chino, CA United States  
Bought this product expecting a full package. Only received the motor mount, air filter, recirculation valve, and lower intake hose with clamps. Still have not received the intake duct, upper intake hose or clamps, mountune badge, and even the v3 accessport. Been a couple weeks now with missing products. Should have shipped everything together at the same time.

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  0 of 0 people found the following review helpful:
B3 Package Review November 21, 2018
Reviewer: Peter Herbein from Wyomissing, PA United States  
Great upgrade! Easy to install. Wakes up the car big time! 28lbs of boost all day! Have fun. The V3 is very fun and gives you tons of feedback from the motor. I'm on 93 octane fuel.

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  0 of 0 people found the following review helpful:
Slow shipping October 22, 2018
Reviewer: Scott P from Santa Maria, CA United States  
It took a few weeks to get everything that was in the package. I had no idea of what was in stock and what was coming later.  I received 3 separate shipments. Communication was not very good. I had no idea what or when to expect shipments. I feel if you buy a package of parts they should all come together. The quality of the parts is fantastic. The directions for the AP could be a little better (especially for a novice). But, the tuner is responsive and helpful.  I'm not sure on the final product (tune), but I have noticed a significant increase of power and the way the car responds. I'm looking forward to dialing it in.

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