BMW M235i F22 F23 N55 ECU Remap - Stage 1 (400 bhp) or Stage 2 (420 bhp)

Direct-fit ECU remap for the BMW M235i (F22 and F23 chassis) with N55 engine. No hardware changes needed.

• Stage 1: 400 bhp, stock turbo and intake - daily driver friendly, no compromises
• Stage 2: 420 bhp, requires supporting mods - sharper boost control, faster spool, track-day ready
• Dyno-tuned live on our hub dyno; includes pre-tune health check and before/after printouts
• Real-world validated across UK roads and circuits - not a generic file
• Optional extras: cold start delete, adjustable burbles, GTS-style startup sound