The factory book says the distance between the strut towers is 1002.2mm +-2mm (39.5"). Measured from center to center (where the shock sticks thru). We have found many cars that measure about 980mm (38.5"). This leads us to believe BMW made two slightly different unibodies. Therefore we now make two versions of our brace. This is what IE says, so its probably why some of you are having trouble fitting your strut bars.
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