BMW‘s straight-six engine is alive and well today. The modern S58 mill, found in the M4 CSL, chucks out 550 horsepower like it’s no problem. Armed with two turbochargers, 350-bar injection, and a closed-deck block design, the S58 represents one of the pinnacles of current BMW engineering. Having such a strong dedication to the inline-six power plant didn’t happen overnight, though.
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