Cylinder Head U20
Cylinder Head G15 R16
Datsun Roadster Valve Stem Seal - (Set Of 8) OEM MAKER TO NISSAN
NOTE:63 - 65 1500 & 65 - Early 67 1600 cylinder heads can be modified to accept these better seals. Early o-ring seals are not only out of production, but they do not control oil from dripping down the guide resulting in excessive oil consumption and carbon build up on the valves.
To convert these cylinder heads the cylinder head must be removed from the vehicle. Remove the valves and have your machinist remove the small step that sits underneath the inner valve spring. This will allow this later style valve seal to work.