Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 521 seals have a .545" OD and fit applications with 3/8" valves and .500" OD guides.
- Engine Components>Valve Seals
- EPA:N/A
- LTL:N
- MPN:521-8
- Non-CARB:N
- Prop65:Y
- SpecialOrder:Y