BMW has quite a few engines worth checking out for a potential swap, and the M42 and M44 are two decent four-cylinder picks. They aren’t known as the most reliable BMW engines ever built, but that doesn’t mean they are complete duds either. On the surface, the pair of motors appears to have a lot in common, and that’s because they do. Still, despite the similarities, the M44 is the more powerful of the two. That means if you’re
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