It has an identical 4.4-liter twin-turbocharged V8 as the range-topping X6 M Competition, but tuned to 523 horsepower and 553 lb.ft of torque instead of 617 horsepower found on the X6 M Competition.
It is definitely worth noting that the power boost is also available for other fast Bimmers that pack the same powertrain, including the G1X M850i, 750i, G30 M550i, X7 M50i, and X6 M50i.
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Now it’s turned its attention to the new, G87-generation model, introducing a package of tuning options including ECU, exhaust, suspension and more. The headline figure is 640bhp, the power ...
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