- Designed to give stock pressures and work with stock cam profiles
- Retainers, keepers, and bases are modeled using FEA (Finite Element Analysis) to maximize mechanical strength
- Springs are wound from Super Clean chrome silicon valve spring wire that has been heat treated and shot peened
- Manufactured to original O.E.M. specifications using premium modern materials, design protocols and manufacturing techniques
- Made in the USA
Kit Includes:
- 4x CrSi Valve Springs
- 4x H.T. Steel Retainers
- 4x H.T. Steel Basewashers
- 4x H.T. Steel Keepers (Pair)
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1936-1937 | Harley-Davidson | E V Twin 61 | |
| 1941-1947 | Harley-Davidson | E V Twin 61 | |
| 1936-1947 | Harley-Davidson | EL V Twin 61 | |
| 1941-1947 | Harley-Davidson | F V Twin 74 | |
| 1941-1947 | Harley-Davidson | FL V Twin 74 | |