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Comp Cams COMP 521-16 (16-Pack) Valve Stem Seal 3/8" Valve Stem 0.500" Guide Positive Stop Steel Body / Viton Listing ID: 930785UPC: 036584151814Manufacturer Part Number: 521-16Reference Part Number(s): COM521-16 Out Of StockBrand New
Product Information Providing the best sealing properties/spring clearance, viton valve seals are an excellent choice in performance applications. The 521 seals have a .545 OD/fit applications with 3/8 valves/.500 OD guides. Attributes Guide 0.500" Guide Model Valve Stem Seal Style Positive Stop Material Steel Body / Viton Quantity 16 Valve Stem 3/8" Valve Stem
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