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I know, I know... sports cars are not supposed to have mud flaps. However my sports car gets a lot of track miles as well as trips to and fro the track on R-compound tires - read super sticky. The bodywork on the front fenders down low just behind the front tire was taking a beating, as in so many chips the bare metal was showing and surface rust had started. Keep in mind I have been touching up this area frequently but there was just no way to keep up with it.
Personally I find these debris winglets to be subtle, tasteful and effective. I just bought some big truck mud flaps made out of a rigid plastic, made up a bunch of paper templates till I found a shape that worked and then cut them out from the big truck flaps. Mounting was easy, I used the two existing screws that hold the inner plastic fender and then just added 3-aluminum pop rivets on the inner side.
These things really protect the paint on the front lower rocker arm.