I made my first air dam on my hybrid Jazz (european version of Fit) today. Jazz already has a small rubbery air dam to begin with. It's about 5cm tall and has 15cm (6") ground clearance.
I pushed my luck a little bit and made an extension of 5cm out of black coroplast. I used duct tape and zip ties to install the coroplast over the existing air dam. The job turned out to be really easy and fast. I drilled a hole through both the coroplast and the rubber and used two zip ties and two washers per hole to keep things in place.
I didn't get a chance to try it yet but it looks good for the first prototype and seems sturdy enough. Will post results soon.
