I had something like that on one of my cars, I put it on there 1/2" off the ground in hopes of reducing lift on the front end at high speed. I also had plumbed in brake ducts and wanted them to get the most air possible.
It did noticeable reduce the sound of the wind on the freeway and seemed to have less front end float at speed. I kept it that way for months unitl I got tired of the looks.
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