Four Banded Viton valve guide seals – install by hand.
These are the only available banded Viton guide seals for Nortons that press on by hand. Won’t dry up oil lubrication to the valve stems like Teflon seals can. The bands insure a tight seal top and bottom and prevent loosening. A perfect fit with JS beehive springs (1/32″ clearance all the way around with stock springs).