[Video] Smoking Tire Puts M4 to the Test

The last episode of The Smoking Tire brought us a BMW M4, tested after some heavy modification.

The car has received a Stage 4 engine tune which means it was upgraded to 525 horsepower. The car is so fast it’s scary to take it out on the regular road. Still, this is a track build and it has no place among other mortals in the city.

Don’t miss the awesome video above!

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