These inner Jeep fenders have been designed to replace the factory plastic liners for a rugged custom appearance with the stock fenders. The mill finish 6061 aluminum is formed to allow clearance for 37" tires with a 3" lift and 40" tires with a 5" lift utilizing the factory high clearance fenders. They come with a perforated vent panel that allows engine bay heat to escape to help keep your Jeep running cool on those hot summer trail days. Each fender comes with removable plastic film to protect the striking mill finish during installation. The included nut tabs allow for an easy install with no rivenuts required. The appearance of these inner fenders is just stunning and will complement your Jeep for a complete custom look thats sure to get some attention. Mill Finish 6061 Aluminum. Allows use of 37" tires with 3" lifts and 40" tires with 5" lifts utilizing the factory high clearance fenders. Perforated vent panel on fronts help reduce engine bay heat.