If you’re involved in NASA’s Super Touring and TT classes, you get the privilege of playing with the aerodynamics on your car. For the front, you’ll need a sturdy splitter, and for the rear, an adjustable wing like this one from Anderson Composites, a company that is part of NASA’s member benefits program.
The wing measures 59.375 inches at its widest point, so check to see if it’s compatible with your car and with the rules in your class. This is a universal-fit, so some custom fabrication may be necessary for your application. $800.