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Gaskets and Gasket Kits

When installing new parts or servicing an engine, reliable gaskets, seals, and o-rings can be one of the most important elements on any job. Gaskets which seal and perform reliably are essential; no one wants to suffer avoidable leaks and performance loss. Zipper’s Performance Products sells gaskets and gasket kits from notable manufacturers like Cometic®, James®, and S&S® for all Haley-Davidson® engine types. Zipper’s Performance stocks most all gaskets, seals, and o-rings individually for 1966-up Big Twins and 1957-up Sportster® engines. (Individual parts are available by phone or email only.)
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  1. Be the first to review this product

    As low as: $119.50

    Cometic® "EST" Gasket Sets for Evolution® Engines - EST gaskets are used in critical sealing surfaces such as rocker box and cylinder base gaskets. Head gaskets included with these kits are Cometic’s ‘MLS’ ("Multi-Layer Steel’) gaskets. The balance of components included with these kits are made from the highest quality materials to ensure that your engine stays leak-free. Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
  2. Be the first to review this product

    As low as: $89.99

    James® Complete Engine Gasket Sets include 1-piece coated composite head gaskets, coated metal rocker box and cylinder base gaskets (except Iron XL®); EV models include rubber rocker layer gaskets. Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
  3. Be the first to review this product

    As low as: $45.29

    S&S® Rocker Box Gasket Sets are a full set of rocker box gaskets for a pair of S&S®-brand rocker boxes. Two styles of rocker boxes are manufactured by S&S® for EV & TC engines, original billet and newer die-cast. These gasket kits do not interchange. The easiest way to identify which one you have is by the rocker cover lid formed o-ring. The die-cast has a flat rubber flapper valve built into the breather window of that gasket; the billet style does not. Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
  4. Be the first to review this product

    As low as: $54.95

    Cometic® Gasket Sets for Shovelhead & Ironhead Sportster® Engines - These gaskets are used in critical sealing surfaces such as rocker box and cylinder base gaskets. Head gaskets included with these kits are Cometic’s ‘MLS’ ("Multi-Layer Steel’) gaskets. The balance of components included with these kits are made from the highest quality materials to ensure that your engine stays leak-free. Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
  5. Be the first to review this product

    As low as: $38.99

    James® Transmission Gasket Kits are all the quality gaskets, seals and o-rings you’ll need to overhaul your transmission. Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
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