Nforcd BMW M3 F80 S55 ECU Remap/Tune - Performance Software & DME Flash | Stage 1 500bhp, Stage 2 520+bhp | Chip Tuning, Custom Map, Dyno/Rolling Road | OBD Programming/Bench Unlock | Cold Start Delete, Burble/Crackle, GTS Start-Up | UK

BMW M3 F80 S55 Performance Software Upgrade - Custom Engine Calibration - Stage 1 and Stage 2 Power Increases

Release serious performance from your BMW M3 F80 S55 with our bespoke engine control software. This is a tailored ECU calibration designed to deliver strong, repeatable horsepower and torque gains, razor-sharp throttle response and a smoother, more urgent drive. Stage 1 targets up to 500 bhp on a healthy vehicle and Stage 2 achieves 520+ bhp, with dyno-tested results and an emphasis on safety, drivability and longevity.

Built for the S55 - not a generic file

• Hand-crafted calibration for the BMW M3 F80 S55 - created to suit your car and your preferences
• Stage 1 - up to 500 bhp with a broad, linear torque curve for rapid real-world pace
• Stage 2 - 520+ bhp potential with crisp boost control and impressive mid-range punch
• Chassis dyno validation with before and after power runs and data-logging
• Pre-tune health checks to ensure your M3 is performing correctly before any software work
• Programming via the OBD port where supported - bench service available for locked or later DMEs
• Smooth, progressive delivery with refined part-throttle manners for road or track

Popular add-ons and personalisation

• Cold start noise reduction for a quieter start-up in residential areas
• Adjustable overrun crackle levels for a subtle or more pronounced exhaust character
• GTS-style start-up acoustics for an eventful ignition sequence
• Additional requests available on consultation to match your driving style

Proven on the dyno. Developed with care.

We validate our calibrations on a hub-mounted dynamometer and provide clear, transparent results so you can see the improvement in power and torque. Only once baseline checks confirm your M3 is healthy do we proceed with the flash, ensuring reliability remains front and centre.

Tried by us. Loved by our customers.

We run this calibration on our own cars and feedback from M3 owners has been outstanding - quicker response, stronger mid-range and a more connected feel without sacrificing refinement. If you want an S55 tune that feels OEM-plus and delivers serious pace, this is it.

Installation and booking

Professional fitting and dyno calibration available at MJ Modifications in Warwickshire. Request a quote or book your BMW M3 F80 software upgrade by emailing info@mjmodifications.co.uk.

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