Engine Valve Stem Oil Seal Set

viton valve seals are an excellent choice in performance applications. The 521 seals have a .545" OD and fit applications...

COMP Cams Part #: BDQQ_521-12

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Engine Valve Stem Oil Seal Set

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.

BBK

Dyno Racing

Nitro Performance

Top Gear Tuning