*These side splitters will fit into factory holesKit IncludesLeft and right Side SplittersFitting kit (Plastic Spacer & Stainless Steel Hardwares)Assembly and installation instructions Material 10mm Thick HDPE PolyethyleneFlexible and impact resistantPerfect rounded edge Finish Matte Black Gloss Black Winglets Winglets are vertical 10mm thick fins bolted over the splitter on each extremity. They will came painted with the same finish as the part you ordered. When combined with a front splitter, side splitters or rear spats, the parts will come pre-drilled. The winglets themself are also pre-drilled for an easy install. We are providing stainless steel screws to mount them on the splitter. Why installing a splitter?Side splitters aren’t only used for their nice aggressive look they gave to your car. They are generally used for track racing to increase handling and stability. At high speed, the air is an important factor in driving. Air that goes under the car will lift the vehicle, which decreases traction. Side splitters will deflect air direction and will help to add positive downforce. Also, the side splitter is a good way to protect your pricey side skirts. As well it’s known to make a lower effect on the side of your vehicle.