Ford Focus RS tuning
litchfield logo
litchfield logo


We received our first Focus RS in April 2016 and immediately began the work developing our performance enhancements. In January 2017 we received our second new RS, which has allowed us to accelerate this process.

Living with the RS on a daily bases we feel we have produced a series of upgrades that will significantly enhance the car's many strong points and remove some of the frustrations.

We have tested our products on our in-house dyno as well as famous race tracks like Silverstone and the Nurburgring to insure we can provide the very best in reliable performance.

Focus RS Cobb Accesport
Focus RS Nurburgring testing

Cobb Accessport V3

The Cobb Accessport V3 provides quick and easy access to the ECU as well as reflashing of the ECU back to standard, should the car require an update from the Ford dealer. It also provides remote assistance and updates from Cobb’s technical team

Accessport V3 features:

  • Larger, full color, higher resolution screen over V2
  • Customizable multi-gauge display
  • Provide 0-60 times
  • Provide 1/4 mile times
  • Custom RPM ranges for perfect gear changes.
  • In vehicle mount, with on/off switch
  • Faster and easier to use with a familiar face
  • Interchangeable faceplates
Ford Focus RS
  • No hassle launch control - Enabled on all our calibrations, this features allows for easy use of the launch control system. Once our calibration file is flashed onto the vehicle, the process of getting into launch mode is simply having the clutch pedal and accelerator pedal depressed fully. The vehicle should quickly raise engine speed to the determined RPM set in the calibration file. These values can adjusted live using the Accessport.
  • Flat foot shifting - Enabled on our latest calibrations, this features allows the accelerator pedal to stay fully depressed while shifting the vehicle. The use of the clutch pedal will still be necessary, but keeping the accelerator pedal fully depressed between shifts allows for the turbo to stay spooled between gears.
  • 5 Way map switching - This feature enables users to switch between map slots on the fly. Once a new calibration file is flashed onto the vehicle, the end user can use the factory cruise control system to switch between different maps. The number of available maps is adjustable with Accesstuner software and we provide 3 maps based on Fuel Octane which are switchable in real-time. Additional map slots can be provide during custom tuning for things like. Custom tuned calibrations can contain up to 5 switchable maps.


Cobb Accessport

£698.00 exc VAT

£837.60 inc VAT

Further Information

COBB Tuning - Accessport V3 Install Uninstall Tutorial

COBB Tuning - Accessport V3 Gauges Tutorial

For more information please visit - COBB Accessport V3 FAQs

Focus RS Exhaust Options

Milltek logo

We are able to supply a wide variety of Milltek exhausts for the Focus RS, from EC approved cat-back to a full turbo-back de-cat non-resonated. All are available with four different GT-115 trim options - Burnt Titanium (£462.26 inc vat), Cerakote Black (£303.29 inc vat), Polished (£177.47 inc vat) and Titanium (£407.35 inc vat). There are two main cat-back exhausts, the EC approved resonated and the louder non-resonated version.

Additional to the catback systems there are five different downpipes, de-cat to Milltek (£216.83 inc vat), de-cat to OE system (£236.47 inc vat), ECE high flow cat (£1173.90 inc vat), Sport 200-cell cat to Milltek (£730.26 inc vat) and Sport 200-cell cat to OE system (£749.90 inc vat). Only the ECE high flow cat does not need a remap. For customers looking for more power and who will be remapping their RS's ECU we have the option of our higher flowing 100cell cat, as featured in our Stage 2 upgrade (£874.80 inc. vat).

Focus RS Milltek

Milltek Cat-back Resonated w/ Polished Tips


£1,305.34 exc VAT

£1,566.41 inc VAT

Milltek Cat-back Non-resonated w/ Polished Tips

£1,197.05 exc VAT

£1,436.46 inc VAT

Milltek Large Bore Downpipe (For Milltek Cat-back)

200-cell downpipe

£826.37 exc VAT

£991.64 inc VAT

Milltek Large Bore Downpipe (For OE exhaust)

£846.37 exc VAT

£1,015.64 inc VAT

Remus logo

Litchfield are also able to supply and fit Remus Wolf Inside Cat-back exhausts with integrated valves for the Focus RS. There is one tailpipe option, brushed stainless, at 76mm rather than the standard 70mm.

Focus RS Remus exhaust

Remus Wolf Inside Cat-back exhaust

From: £1,365.18 exc VAT

£1,638.22 inc VAT


Litchfield KW Focus suspension

Litchfield Suspension Kit by KW

Litchfield has been working closely with world-renowned suspension manufacturer KW, to produce a unique suspension package to improve both the ride and handling of the Focus RS mk III.

Having our own development vehicles has allowed us to experience the standard car’s setup in daily driving, fast road and on track conditions. We felt we could significantly improve the ride quality and enhance the already superb track manners of the RS.

Designed from the outset to work with the RS’s switchable damper settings, the new Litchfield suspension kit will allow the driver to switch from the more comfortable road setting to the stiffer track setting in exactly the same way as the original system. However now the track mode has more compliance, allowing it to be more suitable for fast road driving as well as circuit work.

The development work included sending our MY17 Focus RS to Germany where the KW team could evaluate the original setup on the road and on their 7-post rig. This special F1-grade testing equipment, one of only 15 in the world, allows the engineers to simulate all kinds of driving conditions and suspension frequencies to fully understand the RS’ chassis. A team from Litchfield then flew over to test the first sample kit.

KW Focus testing 1
KW Focus testing 4

The car's comfort level is now much higher in the ‘Normal’ mode. The new damper and spring rates control the body movement superbly whilst allowing the tyres to find more grip under cornering and acceleration.

Switching into ‘Track’ mode still keeps a level of adjustment which means that it is able to ride bumps rather than skipping off them.

To refine the system further, KW have provided additional development kits featuring minor revisions following our road test feedback. We have begun testing these new revisions back to back on our two development cars to find the perfect combination that will be unique to the Litchfield suspension kit.

Focus RS test cars

KW have begun to produce the key hardware for the initial order and we have signed off on the finished setup at the end of May, with production kits versions available late August. As such we are now taking pre-order deposits as initial production will be limited.

If you have any questions or require more information please contact us to see how we can improve your Ford Focus RS.


Litchfield Suspension Kit by KW


Further Chassis Modifications

Wavetrac Front Limited Differential

Wavetrac Limited slip front differential for the Focus RS 3. Massively improved front end grip when cornering, increased stability on braking and improved steering feel. This is a fit-and-forget differential that does not need specialist servicing and uses the standard oil.



Eibach Anti-Roll Bar Kit

The Eibach Anti-Roll bar kit help to keep body-roll at a minimum by controlling lateral and centrifugal forces. The result is improved handling and increased grip whilst cornering, especially during high suspension loadings experienced on track. The Focus kit uses 29mm front and 26mm rear tubular bars with 2-way adjustment on the rear.


KW 12.5mm Wheel Spacer Kit

As fitted our own car, KW 12.5mm hubcentric wheel spacers for both front and rear. Gives a 25mm overall track increase.

£313.33 exc VAT

£376.00 inc VAT


Powerflex have created a range of chassis support bushes for the Focus RS 3 in both purple (road biased) and black (track biased).

Bushes available (click here for a diagram):

  • Front Anti-Roll Bar to Chassis Bush 24mm (x2, ref 3)
  • Lower Engine Mount Bush (x1, ref 20)
  • Lower Engine Mount Bush Insert (x1, ref 20)
  • Front Upper Right Engine Mount Insert (x1, ref 25)
  • Transmission Mount Insert (x1, ref 26)
  • Rear Diff Front Mounting Bush Insert (x1, ref 30)
  • Rear Diff Rear Mounting Bush Insert (x2, ref 31)
  • Lower Engine Mount Small Bush (x1, ref 21)

Please contact us for pricing