Twin Power 66-E81 83-84 Shovelhead Chrome Rear Tappet Guide Replaces H-D 18602-80Made from chrome, these tappet guides are machined to accept late 76 84 retaining screws, 1 4" 20. They can also be used on 36 E76 engines with P N 041602 Allen screw set and on L81 82 engines if tappet guide evacuation lines are removed. This Part Fits: Year Make Model Submodel 1980 1981,1983 1984 Harley Davidson FLHS Electra Glide Sport Base 1983 1984 Harley Davidson FLHTC Electra Glide Classic Base 1980 1981,1983 Harley Davidson FLT Tour Glide Base