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There was a time when SUVs were mostly family haulers and vehicles prepped to tackle the great outdoors. But once they became extremely popular, automakers began developing high-performance versions.

Nowadays, there are loads of beefed-up crossovers available and the BMW X3 M Competition is one of the most powerful you can buy at 503 horsepower. But thanks to aftermarket tuners, the X3 M can produce notably more power. Enough to give sports cars like the Mercedes-AMG GT R a run for their money.

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