COMP Cams - 520-16
Valve Stem Seal - Positive Stop - 5/16 in Valve Stem - 0.530 in Guide - Steel Body / Viton - Set of 16
Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 520 seals have a .575" OD and fit applications with 5/16" valves and .530" OD guides.
Seal Outer Diameter: 0.575
Valve Guide Outer Diameter: 0.53
Valve Seal Type: Metal Body Viton
Valve Stem Outer Diameter: 5/16
Amazon ASIN: B002EDYM64
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?: Yes
C.A.R.B. Exemption Reason: No impact on pollution output of vehicle.
C.A.R.B. E.O. Number: N/A
