BMW launched its X4 crossover model in 2014, and gives it the M performance treatment for the Detroit auto show.

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A more aggressive fascia gives it that M look.

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Benefiting from BMW's innovative technology, the X4 M40i can be had with LED headlights.

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Under the hood, the X4 M40i's turbocharged 3-liter inline six-cylinder engine makes 355 horsepower and 343 pound-feet of torque.

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The 19-inch wheels are staggered, with Michelin Pilot Super Sport tires front and rear, with the rears featuring 30 millimeters more width.

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As further handling help, the X4 M40i gets its all-wheel-drive system tuned for a rear bias.

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The rear hatch offers easy access to cargo space, but the fastback rear limits capacity.

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The dashboard features M cues here and there.

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An eight-speed automatic transmission receives a sport mode that holds the revs high, for enhanced throttle response.

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The lack of M buttons on the steering wheel suggests the X4 M40i isn't as hard-core as its performance siblings.

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