We developed these side plates with the help of JKF Aero to help round out the front end aero on your car. They were CFD developed and tested on an S550 Mustang and a C6 Corvette with large tunneled splitters, but have been proven effective on several other chassis as well. They were wind tunnel tested at will produce an additional 60-70lbs of front downforce at 100mph on a larger tunneled splitter. They are sold in pairs but due to the unique nature of custom large splitters, hardware and mounting solutions will be up to the installer.