Last month we decided to improve the tune we released last year for the BMW M5 F10 / M6 F13. The car was tested at Smokeys Dyno in Ohio using 93 octane and had a Meisterschaft cat-back exhaust (also 22″ wheels), the results were excellent. The result was 730.4hp to the crank. (The dyno sheet attached is not of the final result). The dip on the chart was due to the dyno fans. Wheel horse power is shown. Also check out this link