Nforcd BMW 435i N55 Remap & Chip Tuning (F32/F33/F36) – Stage 1 400 bhp / Stage 2 420 bhp | UK Dyno/Rolling Road Tune | OBD Flash & ECU Bench Unlock | BMW 4 Series Performance Map | Cold Start Delete, Exhaust Burble/Overrun, M Start-Up Bark

BMW 435i N55 Performance Software - Stage 1 up to 400 bhp, Stage 2 up to 420 bhp

Unlock serious real-world pace from your turbocharged N55 with a bespoke 435i calibration that delivers smooth, repeatable power and factory-like drivability. Developed and refined in the UK, this custom engine map is created on a controlled dyno cell with proper before and after data, then tailored to your specific vehicle for consistently strong results on road and track.

Power Gains You Can Feel

• Stage 1 - up to 400 bhp on the BMW 435i N55
• Stage 2 - up to 420 bhp on the BMW 435i N55

Expect sharper throttle response, stronger mid range torque and effortless overtaking. Final figures depend on vehicle health, supporting hardware and fuel quality.

Why Choose This BMW 435i Calibration

• Custom tailored file for your car, not a generic download. Boost control, ignition and torque targets are optimised to suit your setup.
• Dyno proven with genuine power runs so you can see the gains from your performance software.
• Pre tune health check to ensure your N55 is in top condition before any mapping work is carried out.
• User selectable features including cold start suppression, configurable exhaust overrun burbles and an M style start up bark.
• OBD port flashing or direct ECU bench service available for units that require unlock via bench connection.
• UK N55 specialists with extensive hands on experience. We run this calibration on our own cars and customers consistently report excellent results and reliability.

What Is Included

• Bespoke BMW 435i N55 engine calibration tailored to your vehicle
• Rolling road verification with before and after printouts
• Advice on supporting hardware to maximise outcome
• Aftercare and support from a knowledgeable UK team

Fitment

For BMW 435i models equipped with the N55 engine. If you are unsure about compatibility, get in touch and we will confirm for your car.

Installation and Booking

For the best results we recommend professional installation and calibration at MJ Modifications in Warwickshire. OBD port programming and ECU bench unlocking services are available. To request a quote or to discuss Stage 1 versus Stage 2 for your setup, email info@mjmodifications.co.uk.

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Transform how your BMW 435i drives. Add to cart or contact us to book your custom dyno session today.