The exclusive AGR Tri-Bearing, Billet Aluminum End Cap and Billet Top Cover represent several engineering breakthroughs in steering gearbox design. The AGR TRIBEARING and Billet Top Cap reinforce the sector shaft for precision handling and superior durability, even under race conditions. The 6061-T6 BILLET ALUMINUM END CAP AND TOP COVER aid in cooling the steering fluid. AGR Racing Gearboxes are manufactured to specifications that have been race proven over the years. Each box has a safety wired top cover and #6 JIC fittings installed.