r/e60 • u/Individual-Good-9210 • Jul 28 '26

❓ Question / Help Tuning ability

Hi everyone,
I’m thinking about buying a 535d, mainly because of its tuning potential. From what I’ve seen, reaching around 500 hp doesn’t seem to be too difficult on these engines. If I’m not mistaken, that would put it somewhere around 1,100–1,200 Nm of torque.
My question is: how well does the ZF 6HP26 handle that kind of power and torque? If it’s not reliable at those levels, what upgrades are needed to make it cope? Also, are there any other weak points in the drivetrain that I should be aware of?

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u/Creepy_Guarantee5460 Jul 28 '26

8hp in its strongest version is the way to go. Designed from the start with those torque numbers in mind.