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Message: <blockquote data-quote="Devillian" data-source="post: 656116" data-attributes="member: 22102">Haha might be awhile. I think some of the major tuners may focus on a turbo upgrade for the M5 first.Taking the 335 as an example, a 700bhp version would still not be able to keep up with the M3 on a track. So when they develop the 535 upgrade, they would have to consider the cost of the turbo upgrade vs the used market prices of the F10 M5. Considering that the research & developement, plus the parts cost of developing a turbo upgrade for the 535 and the M5 would be about the same, they may focus on the M5 first, to give themselves a bigger margin.Should point out this is just my take on the scenario that would play out.</blockquote>