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Here is my question. I have owned a lot of performance cars...GTR, C7Z06, SL63 AMG, blah blah blah....
They all have a sticky thread about a primary flaw that would make you second guess modding. With the GTR it is the Transmission, with the SL63 it was head bolts, with the Z06 it was overheating.
Other than the clutches being weak, what item makes F10 M5 owners scared to mod even at an entry level?
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