We developed these splitter flaps 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, but have been proven effective on several other chassis. They are sold in pairs. Since they are a universal aero part, they do not come with hardware. Final mounting solution is up to the end installer. They are 16.5" long but can be cut down as necessary as seen in the pictures.