- Attach OE style 3-hole inner primary covers to specific models
- Made in the U.S.A.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1937 | Harley-Davidson | E V Twin 61 | |
| 1941-1950 | Harley-Davidson | E V Twin 61 | |
| 1937-1952 | Harley-Davidson | EL V Twin 61 | |
| 1941-1950 | Harley-Davidson | F V Twin 74 | |
| 1941-1948 | Harley-Davidson | FL V Twin 74 | |
| 1949-1954 | Harley-Davidson | Hydra Glide FL | |
| 1953-1954 | Harley-Davidson | Hydra Glide FLF | |
| 1937-1948 | Harley-Davidson | U V Twin 74 | |
| 1937-1940 | Harley-Davidson | UH V Twin 80 | |
| 1937-1948 | Harley-Davidson | UL V Twin 74 | |
| 1937-1940 | Harley-Davidson | ULH V Twin 80 | |