Few automakers combine luxury and performance as well as BMW, and one could argue the two come together most elegantly in its ‘M’ vehicles series. There are a lot of things that make the engines from the BMW M series so good. They tend to be larger, they’re relatively rare, and they’re all tested at the legendary Nürburgring circuit. One of the most advanced engines in these cars is the S58, a straight six-cylinder powerplant that can be modified
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