Adjuster kit fits Shovel 1966-later. The Ram Jett rocker adjuster kit will cure both rocker arm clatter and leaker rocker shaft plugs. The kit contins four each of hardened steel spacers, tempered black pre-load spacers and the well known Ram Jett rocker seals. Unavailable in the local hardware store, each piece has been painstakingly engineered and is completely fabricated from the Ram Jett tooling, designed solely for the Harley valve train. Sold as set.