{"product_id":"james-gaskets-big-twin-primary-housing-gasket-quad-seal-derby-softail-dyna-10-681-4620","title":"James Gaskets Big Twin Primary Housing Gasket - Quad Seal Derby Softail Dyna 10… — Harley-Davidson (1984-1999)","description":"\u003cp\u003eJames Gaskets big twin primary housing gasket for Harley-Davidson and Indian Motorcycle V-twins, engineered to seal the primary cover against oil leakage. Made in the U.S.A. using state-of-the-art materials and production methods.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMade in the U.S.A.\u003c\/li\u003e\n  \u003cli\u003eQuad seal derby design\u003c\/li\u003e\n  \u003cli\u003eOEM-grade gasket material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e James Gaskets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 25416-84-X\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 6.85 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10.05 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 0.65 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.155 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits V-twin Harley-Davidson and Indian Motorcycle big twin engines with primary housings designed for quad seal derby covers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat's the difference between this gasket and a standard primary gasket?\u003c\/h3\u003e\n\u003cp\u003eThe quad seal design provides superior oil retention compared to standard single-seal gaskets, reducing weeping and leaks.\u003c\/p\u003e\n\u003ch3\u003eIs this a direct OEM replacement?\u003c\/h3\u003e\n\u003cp\u003eYes — James Gaskets manufactures this gasket to OEM specifications as a direct replacement for factory primary housing seals.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my Softail or Dyna?\u003c\/h3\u003e\n\u003cp\u003eThis gasket fits big twin V-twins with quad seal derby primary covers, which are common on Softail and Dyna models. Verify your primary cover style before ordering.\u003c\/p\u003e\n\u003ch3\u003eDo I need any special tools to install this?\u003c\/h3\u003e\n\u003cp\u003eStandard gasket scraper and hex wrenches are sufficient. Remove the primary cover, clean the mounting surface, and bolt the new gasket in place.\u003c\/p\u003e","brand":"James Gaskets","offers":[{"title":"Default Title","offer_id":53035210539119,"sku":"681-4620","price":38.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_3b1c1d8b-8918-4366-b3d0-a481005c8618.png?v=1779561500","url":"https:\/\/vtwinbikers.com\/products\/james-gaskets-big-twin-primary-housing-gasket-quad-seal-derby-softail-dyna-10-681-4620","provider":"Vtwinbikers","version":"1.0","type":"link"}