
BMW's lineup of straight-six powered M cars have gained serious popularity thanks to the engine's ability to make big power reliably. One tuner seems to have pushed the envelope a bit too far, though, and the results are catastrophic.

BMW's lineup of straight-six powered M cars have gained serious popularity thanks to the engine's ability to make big power reliably. One tuner seems to have pushed the envelope a bit too far, though, and the results are catastrophic.