Twin Power YTX-20H Shocker Battery Replaces H-D 65991-82B 310 CCATwin Power Shocker Batteries are endurance and laboratory tested for long and reliable performance with a heavy duty O. E. M. style case. This Part Fits: Year Make Model Submodel 1986 1990 Harley Davidson FLST Heritage Softail Base 1988 1990 Harley Davidson FLSTC Heritage Softail Classic Base 1990 Harley Davidson FLSTF Fat Boy Base 1974 1984 Harley Davidson FXE Super Glide Base 1979 1984 Harley Davidson FXEF Fat Bob Base 1987 1994 Harley Davidson FXLR