The Rock Krawler Upper C Gussets are the perfect solution for all of your vehicle gusset needs. They are 5/16 inches thick and are designed to strengthen your weak factory upper Cs and two are included in each kit. These Upper C Gussets will fit both Dana 44 and Dana 30 front axle housings and will tie directly into your spring mounting pads so you do not have to remove the upper ball joints.