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wow, dont see these very often on the E9x platform, free bump!
I had a 3.91 diff upgrade that was paired with blower on my E46M3, def a fun combo, getting into/staying in boost range much sooner and easier as that engine really lacked low end torque
deansbimmer, just curious, I think Dinan's 3.91 and 4.10 rings and pinions are essentially refinished BMW Motorsport parts, do you know if that's still the case with this one?
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~ S65 + Harrop Love ~
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