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G20 M340i daily driver build — 500hp street sleeper
The B58 is the best tuning platform BMW has made since the N54. Your 470hp on stage 2 is right in line with what I see on my M340i. For the next step, the Pure Turbos stage 2 is an...
3 months ago
MHD vs BM3 vs JB4 — ultimate BMW tuning platform comparison 2026
Running BM3 on my M340i B58 and it is excellent. The flex fuel integration is the killer feature — with a Continental flex fuel sensor and BM3 stage 2 E85 map, my car makes 480hp o...
3 months ago
X4 M40i B58 — same engine as M340i, same tuning potential?
Great numbers. The B58 is the same across all models — M340i, X3 M40i, X4 M40i, Z4 M40i, Supra. The tuning potential is identical. The only difference is weight and drivetrain loss...
3 months ago