Here are a couple pics of my Festiva with my crude Kamm and skirts. Since these pics I have changed the angle of the Kamm and used all Aluminium tape.
Not sure if it is working yet, but I get a lot of looks!
I hope to see 3-5% but it is getting colder and my mpg is dropping as it always does, so I will keep it on for a year and get real data.
Ps. I just noticed the date of the previous post....so mine is a major BUMP, lol......