Since 1979, V&H has sacrificed nothing, and given everything, to provide you with products that are meticulously engineered and manufactured to standards far surpassing the industry. Thirty years of racing. Thirty years of winning...Vance & Hines. Kit allows select pre-closed-loop Harley-Davidson models to run newer style exhaust systems equipped with O2 sensor ports. Includes two zinc-plated, Allen-head threaded plugs with sealing washers. Simply screw into nonessential sensor ports.