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COBB Accessport V3 ECU Flasher - Ford Focus RS B5 Package
COBB Accessport V3 ECU Flasher - Ford Focus RS B5 Package

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Sale price:$1,849.00
Savings: $177.00

Availability: Due to heavy demand of RS products, customers may receive partial shipments of orders.
Product Code: AP3-FOR-004B5

Auto Start / Stop:

Downpipe Type :

Engine Idle Speed :

Flat Foot Shifting :

Fuel Octane:

Hose Color :

Intercooler type:

Launch Control :

Shift Assist :

Turbocharger Bypass Valve :

Vehicle Type:

Exhaust Burble:


COBB Accessport V3 ECU Flasher - Ford Focus RS B5 Package

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

The mountune Focus RS B5 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 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 calibration team has more Focus RS tuning experience than any other source available to you. Our team has spent countless hours on the dyno and track developing performance upgrades that perform in a wide range of applications. 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
  • 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. Some custom options are only available on vehicles equipped with manual transmissions. 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.

**Please note the switchable slots for the Focus RS are ONLY operational on Mountune calibrations created on or after 1-11-17. ECU Calibrations created prior to 1-11-17 do not have switchable slots. Nor do they have functional Flat Foot Shifting enabled. If you have early programming that does not support slot switching and FFS please contact us to get updated.

***Ford Focus RS with mountune cold air intake (part #2536-CAIS-BLK) installed. Green dyno run has aforementioned parts installed with stock ECU calibration. Red dyno run has aforementioned parts installed with Mountune USA AP 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.

Mountune ECU calibration and hard parts reviewed

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Average Rating: 5 of 5 Total Reviews: 4 Write a review »

  0 of 0 people found the following review helpful:
B5 package February 26, 2017
Reviewer: joe wierback from blowing rock, NC United States  
Can't wait to get more.

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  1 of 1 people found the following review helpful:
WOW ! Big power February 9, 2017
Reviewer: Burton from North Bay  
I purchased the RS as weekend car but it's so much fun I use it every day. I added the Mountune B5 package after watching the Smoking Tire review and wished
I had done it sooner. The amazing car became even more so. The power off the line is mind boggling and it just keeps pulling. The service from Mountune was very good and professional. I did have to wait a few weeks for the parts but its understandable with the popularity of their parts. I am very happy with the B5 upgrade and will be going back for even more Mountune RS parts soon. Stop hesitating and get more power.

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  0 of 0 people found the following review helpful:
First time user November 28, 2016
Reviewer: Brandon Kromko from South Abington Township, PA United States  
Great customer service helped out with my issues that I was having. Great prices and strongly recommend.

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  0 of 0 people found the following review helpful:
Mountune B5 Package September 16, 2016
Reviewer: Ty Hampton from San Mateo, CA United States  
It has now been over 1,000 miles with the Mountune B5 Package for my 2016 Focus RS (approx 800 miles on the car before the installation). I am extremely pleased with the results. The rear motor mount made a big improvement in handling. The air intake upgrades further enhances the induction noises with a slightly deeper tone. The  Access Port software is brilliant! The boost is consistent, powerful, and sophisticated.

I am very pleased with this package. It takes an already awesome car to the next level.

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