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I was just watching a vid of the vector M (1" shorter than the motion XL) on a prior gen x5 and it's the absolute longest I'd put on an x5.
I have the xxl on wingbar evos on my x7 and it's noticeably louder empty than full. up over 65mph on the freeway it gets a little noisy, and the volume ramps pretty quickly as you head to 80mph, but it's nothing at all unbearable. Around town and empty, you get some whistle with the windows down, and it shuts up entirely when full.
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2020 bmw xHippo, v8tt edition
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