The 2017 BMW M4 has been spotted testing with an M4 GTS-inspired front splitter and bonnet intakes.
The test car is also wearing a larger rear spoiler than the current production M4 and has gained new LED tail-lights.
No major mechanical upgrades are expected for the 2017 M4, so power will still come from the same twin-turbocharged straight-six engine as today’s production model, but output will be increased beyond the 425bhp and 406lb ft of torque produced by the current car.
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