Hydraulic version of a "B" cam. Usually a bolt-in, but spring spacing required on stock 1980-'81 Shovel heads.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1970-1977 | Harley-Davidson | Electra Glide FLH | |
| 1970-1972 | Harley-Davidson | Electra Glide FLHF | |
| 1977 | Harley-Davidson | Low Rider FXS | |
| 1974-1977 | Harley-Davidson | Super Glide Electric Start FXE | |
| 1971-1977 | Harley-Davidson | Super Glide FX | |