We here at Top Speed love tuned machines, we love them even more when they are racing, but there is a special spot in out hearts for fast wagons. The owner of the BMW M5 must not have known what he was looking at when the Audi RS6 Avant built by tuners MTM rolled up and challenged him to a race. It appears that the BMW is equipped with a Super Sprint exhaust, good for another 40 HP over the 5.0 Liter V10's 500 HP, but one thing is for certain, an exhaust is no match for a fully built 700+ HP machine.

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