This kit repairs the Jeep TJ Wrangler center frame section between the front and rear lower control arm mount brackets where the skid plate bolts up to the frame. The ART-113-4 is 41" long and is CNC cut and MIG welded by our certified welders at our USA factory. The kit is designed to fit over your existing frame after the rusted portion is removed. The repair is then welded onto the frame to make your Jeep safe again. The ART-113-4 is notched to go around the existing body mounts and comes with four skid plate mounting bolts and welded nuts. The ART-113-4 fits all TJ models between 2003-2006.