BMW M3 (F80) & M4 (F82)
POWER UPGRADES


We are able to offer a complete tuning solution for the F-Series BMW M3 and M4 ECUs (including later model OPF cars) using our Ecutek software. This is the most advanced software on the market and combined with our proven calibration provides not only a huge increase performance but also a number of unique features to further enhance the car.

We have fine-tuned the calibration on both on our in-house Dyno as well as living with the setup day to day on the road with our own development cars. Combined with our various track testing sessions, we feel we have developed the ultimate software upgrades for the S55 engine. We have spent considerable time refining the throttle maps and power delivery in each gear to ensure quick but controllable progress. The power is instantly adjustable with the BMW Drive selection modes so you can quickly tailor the delivery to the environmental conditions. Even with the OPF filters and standard exhaust in place we are able to release a massive 106bhp extra with our Stage1 tune,

The new Ecutek software tool not only gives us access to all the critical maps and strategies within the ECU, but it also provides detailed logging capabilities to allow us to quickly analyse our changes and improvements. We pride ourselves on having the best calibrations available for the F-series engines but the introduction of the Ecutek software has lifted these to a whole new level. With the Ecutek software we are able to combine the best of BMWs calibration updates such as the recent CS models along with our own proven tuning adjustments. All aspects of the calibration have been refined and enhanced; from the switchable maps and adjustable Torque using the steering wheel controls to the option of live adjustments the pops and crackles from the exhaust and Per Gear performance using the smart Phone App. The software is extremely powerful and puts the driver in full control.

Our Stage 1 tune is able to take an otherwise standard car from the BMW’s claimed 414bhp and 405lbft to 520bhp with 510lbft with a smooth and predictable power delivery.

Our S55 ECU remaps now feature our latest RACEROM setup which gives you even more control over the cars performance as you can set it up to suit your driving style. Our remaps include a completely new calibration that allows the S55 engine to provide significant increases in power and torque over the standard engine as well as adding some unique features.



Switchable maps

Our default settings which you can change instantly using the Cruise Control buttons are:


  • Map1 95 Octane normal unleaded fuel which will produce around 500bhp and 485lbft (Stage 1)
  • Map2 97/99 Octane Super unleaded fuel which will produce around 520bhp with over 510lbft (Stage 1)

The RACEROM patch also remembers which map you were in when the engine is switched off so if you always run on Super unleaded it won’t need to be changed.

We utilise the Cruise Control buttons while the Cruise is turned off but when you switch Cruise Control back on again the buttons work as normal so you lose no functionality. The software allows for upto 4 separate map slots so let us know if you a specific requirements such as Race fuel use.



Adjustable Torque

This feature lets the driver instantly adjust the torque the engine produces using the steering wheel controls. This is represented on the Driver information display gauges so it is straight forward to select anything from 50-100% of maximum torque. It also changes the percentage of torque being applied to the per gear torque selection so if you have this setup individually and want to reduce torque by 30% it will also apply this same 30% reduction per gear. Ideal for quick changes if the weather turns during on a trackday as you want to do more than just adjust drop the peak torque value as each gear will require this to set differently.



Recalibrated Driver Display

All our remaps include recalibrating the Driver Display to show the engines new power and torque figures.



Vmax removed

All our remaps include removing the top speed limiter so drivers can choose to driver over 155mph on de-restricted Motorways or on track events.


Custom exhaust valve control

All our remaps include adjusting the exhaust valve to give a better exhaust note and reduce drone when cruising.  Especially useful for cars with performance exhaust or downpipes.



Optional Cold Start removal

We can simply remove the Cold Start process that causes the engine/exhaust make a loud unpleasant noise while the ECU tries to warm up the CATs for emissions.  This can become extremely loud on cars with no CATs installed.



Adjustable Pops & Bangs/Burbles

– Requires Bluetooth interface and Phone App


All our remaps have the burble setup similar to the GTS/CS models so it gives a nice sound when in Sports mode. However this can be adjusted using our Phone App to suit each driver’s needs. The simple slider can make the burbles more aggressive of switched off completely.



Adjustable Torque Per Gear

- Requires Bluetooth Interface and Phone App


Within the Phone App the driver is able to easily adjust the amount of torque going to the wheels using a simple slider. We have setup a good default setting for the first 3 gears but now the driver can request more or less torque in 1st, 2nd, 3rd and 4th onwards. This is ideal if you are on a slippery surface, have gripper tyres as few quick changes can really improve the traction and enjoyment of the car.



Optional Ecutek Bluetooth Interface and ECU Connect Phone App

Ecutek’s Bluetooth interface is available now and works seamlessly with the BMW S55 engine in the M2 Competition, M3 and M4 models and allows the driver’s phone to communicate with the car using Ecutek’s free ECU Connect Phone App.

Along with the additional custom maps we highlighted above the ECU Connect setup has a host of other useful features that can be used on most OBD compatible cars (1996+).

  • High Speed Data logging – Display and record factory and RaceROM diagnostic parameters.
  • RaceROM integration – Driver interaction with RaceROM features.
  • Read & clear DTCs.
  • Dashboards – Display real-time data from any parameter in a set of graphical displays using circular gauges, bar graphs or text.
  • Performance analyser – Test and share the performance results online.
  • Archive – Stores log files and performance test results for sharing directly from within the app.
  • ECU info – Provides detailed information about the vehicle concerned.

The Bluetooth interface is in stock now and costs £180 inc. VAT and the phone App is free to download the Apple App Store or the Android Store.



Flex Fuel integration

For customers looking for the ultimate performance we are also able to offer an integrated Flex Fuel system which works with the OE ECU and automatically adjust the performance based on the ethanol content in the fuel tank.

Stage 1 ECU tuning - 520 bhp & 510lbft



Tuning the M3/M4 ECU with the Ecutek software allows us greater control of the ECU and as such provides 520bhp. We've fine-tuned the calibration for both on our in-house Dyno as well as living with the setup day to day on the road with our own development cars. Combined with our various track testing sessions, we feel we have developed the ultimate software upgrades.

M2 stage 1 power graph

The Ecutek software tool not only gives us access to all the critical maps and strategies within the ECU, but it also provides detailed logging capabilities to allow us to quickly analyse our changes and improvements. We pride ourselves on having the best calibrations available for the F-series engines but the introduction of the Ecutek software has lifted these to a whole new level. With the Ecutek software we are able to combine the best of BMW calibration updates such as the recent CS and GTS models along with our own proven tuning adjustments. All aspects of the calibration have been refined; from the adjustable pops and crackles out of the exhaust, to the recalibrated power dials on the centre screen. We have spent considerable time refining the throttle maps and power delivery in each gear to ensure quick but controllable progress.  We put the power in the drivers hands with instantly adjustable maximum Torque settings that work in conjunction with the BMW Drive selection modes so you can quickly tailor the delivery to the environmental conditions. Even with the OPF filters and standard exhaust in place we are able to release a massive 106bhp extra with our standard tune, with power increasing to around 520bhp, with the Ecutek developed tune. Torque increases smoothly  to over 510lbft and is available from low in the rev range to provide huge increases.

Each car that comes in will also have the engine management system checked and updated to the latest BMW software version.

Stage 1 520 bhp ECU tuning with Ecutek software license

£600.00 ex VAT

£720.00 inc VAT


Dyno Tuning

£120.00 ex VAT

£144.00 inc VAT


Remote Tuning Option

Stage 1 ECU tuning with Ecutek software, Bluetooth interface and programming key

£795.00 ex VAT

£954.00 inc VAT


* Late model M3/M4 models have the latest BMW ECU firmware installed at the factory (~March 2019) or may have been subject to a Main Dealer firmware update. This new firmware version removes the loophole that allows direct programming through the OBD port. We are able to simply reverse this to allowing OBD programming, but we do require the car or ECU to be present so we plug in and unlock it (no opening is required). Once completed we can continue to tune remotely as before.

S55 Engine Crank Hub Upgrade



For further upgrading above our Stage 1 upgrade we would recommend fitting our S55 crank hub fix as there have been multiple instances of higher powered cars having the engine timing slip, which puts the car into a limp mode and ultimately stops it from starting.

We offer a couple of options to resolve the problem which we have successfully been applying for a number of years for both customers and other garages that have experienced this issue.

The most straight forward and cost effective solution is to install our Bolt Capture. This CNC and anodised upgrade was developed in-house and stops the crankshaft bolt from loosening over time or under high load. The upgrade only requires 4 hours to install and can be fitted in conjunction with a performance upgrade on the same day.

For more information on this known problem and our options for fixing it, please read our blog post about the issue.


Litchfield Bolt Catcher Crank Hub upgrade

£388.00 ex VAT

£465.60 inc VAT

M4 dyno 1
M4 dyno 2


Stage 2 540 BHP Tuning with Sports Exhaust



Our Stage 2 upgrade uses a performance CAT back exhaust system to allow the engine to breathe more easily and comes with our Ecutek delivered Stage 2 ECU calibration to increase power and noise.

We offer a choice of exhaust options to suit each customer’s noise requirements and budget. All are European made and provide similar performance improvements when combined with our ECU calibration. By retaining the original BMW Catalytic convertor in the turbo down pipes the cars retain their emissions and MOT compliance.

Derbyshire based Milltek Sport have been one of our oldest suppliers and offer superbly engineered solutions for a variety of our performance cars. The Milltek option is produced in full stainless steel system that not only flows better than the standard exhaust but also sounds significantly better. The system uses Milltek’s existing and well-proven EC approved cat back technology, but with the added functionality of the latest valve technology, utilising OE spec BMW electronic valves in its construction – still controlled via the factory command systems.



M3 stage 2 power graph

Stage 2 with Milltek Catback Exhaust with Polished Trims

£2,557.66 ex VAT

£3,069.19 inc VAT


Milltek Catback Exhaust (Supply Only):


Milltek Cat-Back exhaust system with Quad GT90 Carbon Fibre Tips

£1,807.58 exc VAT

£2,169.10 inc VAT


Milltek Cat-Back exhaust system with Quad GT90 Cerakote Black Tips

£1,760.74 exc VAT

£2,112.89 inc VAT


Milltek Cat-Back exhaust system with Quad GT90 Polished Tips

£1,629.75 exc VAT

£1,955.70 inc VAT


Milltek Cat-Back exhaust system with Quad GT90 Titanium Tips

£1,987.42 exc VAT

£2,384.90 inc VAT









The Remus cat-back exhaust system is also available for the BMW M3 and M4. The Remus system features a carefully designed x-pipe which removes the front silencer along with the secondary cats. The rear silencer includes 2 integrated valves which are controlled by the original servo motors.


M4 Remus exhaust 1
M4 Remus exhaust 2
M4 Remus exhaust 3
M4 Remus exhaust 4
M4 Remus exhaust 5
M4 Remus exhaust 6
M4 Remus exhaust 7
M4 Remus exhaust 8
M4 Remus exhaust 9




The system features a shot-blasted finish along with a choice of four different tail pipes designs.

The price below includes the Racing X-pipe, rear silencer (with stainless trims), fitment and an ECU remap to suit.

Stage 2 with Remus Catback Exhaust

£3,191.08 ex VAT

£3,829.30 inc VAT


Remus Wolf Inside with Racing X-pipe (supplied only)

£2,441.08 ex VAT

£2,929.30 inc VAT






Akrapovic logo

Akrapovic Evolution Line


Our preferred choice for the BMW M3 / M4 is the gorgeous titanium Akrapovic Evolution exhaust system. This is the system we have installed on our own M4 demonstrator. As well as delivering power gains throughout the rev range, the Evolution system also greatly improves the M3/M4's appearance and sound. A healthy weight loss of around 7 kg over standard helps along with significantly improved exhaust gas flow. The exhaust uses original valve motor system so does not need extra wiring.

M4 Akrapovic evo 1
M4 Akrapovic evo 2
M4 Akrapovic evo 3
M4 Akrapovic evo 4
M4 Akrapovic evo 5
M4 Akrapovic evo 6



The price includes the slip-on system, evolution pipes, tail trims, fitting and ECU remap.


Stage 2 with Akrapovic Evolution Exhaust

£5,711.97 ex VAT

£6,854.36 inc VAT


Akrapovic Evolution Exhaust (supplied only)

£4,961.97 ex VAT

£5,954.36 inc VAT




Stage 3 - M3/M4 Akrapovic Downpipes - 560 bhp



M4 Akrapovic Downpipe

Stage 3 unleashes the full potential of the BMW M3 / M4 turbos and increases power to a reliable 560 bhp and 530 lbft. Stage 3 is designed for off road use only and uses the full de-CAT down pipes to give the maximum back pressure reduction for increased power and response. The Akrapovic downpipes feature a cast V-band collector and welded heat shielding for improved flow, reliability and heat retention.


For use with any of the exhausts we offer, Akrapovic downpipe (stainless steel) and a full ECU recalibration will give significant gains and also benefits from a 3 kg weight reduction.


Stage 3 upgrade using Akrapovic Downpipes with exhaust option:


Stage 3 with Akrapovic Downpipes and Milltek Exhaust with Polished Trims

£3,877.68 ex VAT

£4,653.22 inc VAT


Stage 3 with Akrapovic Downpipes and Remus Exhaust with Stainless Trims

£4,489.24 ex VAT

£5,387.09 inc VAT


Stage 3 with Akrapovic Downpipes and Akrapovic exhaust

£7,031.99 ex VAT

£8,438.99 inc VAT




Customers looking for more noise and improved performance can also just opt for the Akrapovic downpipes with the original exhaust system. Whilst power levels will drop to around 540 bhp with our Stage 3 remap this represents a very cost effective way to improve both noise and performance.


The price below is for the downpipe (not including a catback exhaust), fitted (based on 4 hours) with ECU mapping to suit. Please note that this removes all catalytic convertors from your car and should therefore be used for ‘off road’ use only.


Stage 3 with Akrapovic Downpipes without exhaust system

£1,973.02 ex VAT

£2,367.62 inc VAT


Akrapovic downpipes (supply only)

£1,073.02 ex VAT

£1,287.62 inc VAT


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