- EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material
- Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly across the gasket surface to eliminate hot spots and gasket failure
- Sets contain all the necessary gaskets, seals, and O-rings to rebuild the top end from the cylinder base upward
- Made in the U.S.A.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1958-1964 | Harley-Davidson | Duo Glide FL | |
| 1958-1964 | Harley-Davidson | Duo Glide FLF | |
| 1958-1964 | Harley-Davidson | Duo Glide FLH | |
| 1958-1964 | Harley-Davidson | Duo Glide FLHF | |
| 1965 | Harley-Davidson | Electra Glide FLFB | |
| 1965 | Harley-Davidson | Electra Glide FLHB | |
| 1965 | Harley-Davidson | Electra Glide FLHFB | |
| 1948-1950 | Harley-Davidson | F V Twin 74 | |
| 1948 | Harley-Davidson | FL V Twin 74 | |
| 1949-1957 | Harley-Davidson | Hydra Glide FL | |
| 1953-1957 | Harley-Davidson | Hydra Glide FLF | |
| 1955-1957 | Harley-Davidson | Hydra Glide FLH | |
| 1955-1957 | Harley-Davidson | Hydra Glide FLHF | |