So the wheel skirts have had a noticeable affect on FE and drag? Have you felt longer glides?
I have a Civic too, but it's an 8thgen sedan. Thinking about getting aeromods. In the spring (or, the next time I drive to/from school and it isn't freezing), I'm going to do a big 260 mile test with masking tape mods to make my hubcaps smooth, block the top grille, maybe skirts or miniskirts, and covering up some seams that look obtrusive. Or is that dumb, to use masking tape (which is, after all, designed to come off...)...I just want something very temporary and cheap.
Also, could you explain how you mounted the rear skirts?
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