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    COMP Cams Engine Valve Stem Oil Seal 521-16

    Vendor: COMP Cams
    Part Number: 521-16
    $25.95

    Currently out of stock.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
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    Product DetailsFAQReviewsRelated Products
    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.


    COMP Cams Engine Valve Stem Oil Seal 521-16


    Specifications:

    California Proposition 65 WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
    Seal Outer Diameter 0.545
    Title Set of 16 Metal Body Viton Valve Seals for .500" Guide Size, 3/8" Valve Stem
    Valve Guide Outer Diameter 0.5
    Valve Seal Type Metal Body Viton
    Valve Stem Outer Diameter 3/8
    Amazon ASIN B002EE6AY0
    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
    Description_SHO Valve Stem Oil Seal
    Description_INV 16 Viton Seals .500" Guide
    Description_INV 3/8" Valve
    Description_ASC Available individually under 521-1
    Description_ASC in a set of 8 under 521-8
    Description_ASC in a set of 12 under 521-123
    Description_KSW PTFE
    Description_KSW Seal
    Description_KSW Valve Guide
    Description_KSW Valve Guide Seal
    Description_KSW Valve Stem Seal
    Description_KSW Valve Seals
    Description_KSW 5/16" Valve Seals
    Description_KSW 11/32" Valve Seals
    Description_KSW .530" Valve Seal
    Description_KSW Umbrella
    Description_KSW O-Ring Seals
    Description_KSW Viton Seals
    Description_KSW 8 mm Seals
    Description_DES Set of 16 Metal Body Viton Valve Seals for .500" Guide Size
    Description_DES 3/8" Valve Stem
    Description_APS Engines w/ 0.500" OD Valve Guides and 3/8" Valve Stems
    Description_EXT Providing the best sealing properties and spring clearance
    Description_EXT 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.
    Description_DEF Engine Valve Stem Oil Seal


    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy
    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy
    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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