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Old 04-23-2019, 09:35 PM   #8 (permalink)
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Originally Posted by Vman455 View Post
I first noticed these at an auto show a couple years ago and was curious about their function. Turns out it isn't an aerodynamic device at all, but is required to meet a FMVSS requirement that rear tires remain inboard of bodywork to 50 degrees past vertical. Some manufacturers use a small plastic add-on:

2018 Mazda Miata

But at this year's Chicago show I noticed some of these are being molded into bumper covers now rather than added as a separate piece:

2019 Jaguar F-Pace

2019 Lexus NX

Thanks for pointing out that those are regulations compliance features. I lanced it off the car at lunch time. Based on that it certainly wasn't helping aero. So off it went.
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