The BMW B58 and S58 are variations of the same engine, but have some key differences. As you might’ve gathered by the name, the S58 is the newer iteration that first powered the BMW X3 M and X4 M in 2020. The big change from the B58 to the S58 is the newer one is beefier with higher horsepower and torque, but it doesn’t mean you have to rush out and perform a swap. As it stands, the BMW B58 is
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