Upgrade your performance with the DID ERT3 Rivet Link from AC Racing. Designed to permanently secure your chain, this essential component is a must-have for all 600cc cars. While our high-quality chains are sold separately with a standard link and clip, for optimum reliability, you must purchase the DID ERT3 Rivet Link. Ensure your chain stays in place under the most demanding conditions with this superior addition. Enhance your racing experience with the trusted expertise and exceptional products from AC Racing.