BMW M3 S55 Engine Failed So Badly It Destroyed Its Own Cylinder Head

The BMW S55 engine has earned its fans, and it’s easy to see why. This twin-turbo 3.0-liter inline-six, found in the F80 M3 and F82 M4, is often called one of BMW M’s more reliable modern engines – if you keep up with maintenance. Out of the box, it puts down 425 horsepower and 406 lb-ft of ...

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