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BMW’s B58 straight-six is found in a number of non-M models ranging from the base X5 to cars like the BMW M240i and even the Toyota Supra. Power output for most models comes in at 335 horsepower while the version in various M40i models tops out at 382 ponies. Now, however, a new version of that B58 is in the works, and it will push the B58 designation to all-new heights.
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