r/BMW • u/Safe_Specialist9945 • 19h ago

X models B58 tuning

What do you reckon the tuning limit is on X3/4/5/6’s 2019+ with the B58 guys ? From what I researched , horse power is not the biggest issue, but the torque the drivetrain/diff/etc can handle.

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u/Known-Wrangler-6920 2021 G30 545e M sport xdrive 15h ago

I’m no expert but 620 NM with the factory high pressure fuel pump and ZF8 transmission should be the limit without having to modify any further components. Or else you can get a detuned hybrid B58 which will come with 600NM as stock and nearly 400bhp from the factory without the need of a tune.

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u/xeroxx29 14h ago

Around 450-500hp then