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500 WHP N55 RSS

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BMW N55 ECU Tuning Guide — Stage 1, Stage 2 & M2 Power Gains, Cost & Process (2026)

The BMW N55 3.0-liter twin-scroll turbocharged inline-six is BMW’s most widely deployed performance engine of the 2010s — powering everything from the 335i and 435i to the M2 and M235i.

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