During the development of our 18-23 Mustang splitter kits, we saw an opportunity to develop this lower radiator baffle. This baffle gets rid of the huge gap left by the factory plastic and forces more of that air through the radiator. This increases the cooling capacity as shown by our pressure probe testing, as well as makes the car more efficient and increases downforce by letting less, useless air under the car creating extra turbulence. The kit comes with everything pictured for an easy install. The video below shows our pressure testing along with the install. It was developed on a factory setup without any aftermarket oil coolers, etc. If you have extra stuff up front some customizing may be needed. These panels are fairly large so have a fixed shipping cost.