{"product_id":"manley-valve-spring-set-part-number-99217-for-harley-davidson-xl-1957-1966","title":"Manley Valve Spring Set Part Number 99217 for Harley Davidson XL (1957-1966)","description":"Manley .490 valve spring kit features OD springs with steel top collars. Interference fit to reduce harmonics and control spring surge.\n\u003cp\u003eUpgrade your Harley Davidson XL engine with the Manley Valve Spring Set, part number 99217, designed for models from 1957 to 1966. These high-performance springs provide 20% more pressure than stock, ensuring improved valve control and durability under demanding riding conditions. The installation is straightforward, requiring no machining, and the set is compatible with stock lift cams up to .490 inches, making it a perfect choice for both restoration and performance enhancements. The springs use the stock lower collars, maintaining original\u003cbr\u003e\nFitment\u003cbr\u003e\nHarley Davidson XL  1957\u003cbr\u003e\nHarley Davidson XL  1958\u003cbr\u003e\nHarley Davidson XL  1959\u003cbr\u003e\nHarley Davidson XL  1960\u003cbr\u003e\nHarley Davidson XL  1961\u003cbr\u003e\nHarley Davidson XL  1962\u003cbr\u003e\nHarley Davidson XL  1963\u003cbr\u003e\nHarley Davidson XL  1964\u003cbr\u003e\nHarley Davidson XL  1965\u003cbr\u003e\nHarley Davidson XL  1966\u003cbr\u003e\nHarley Davidson XL  1967\u003cbr\u003e\nHarley Davidson XL  1968\u003cbr\u003e\nHarley Davidson XL  1969\u003cbr\u003e\nHarley Davidson XL  1970\u003cbr\u003e\nHarley Davidson XL  1971\u003cbr\u003e\nHarley Davidson XL  1972\u003cbr\u003e\nHarley Davidson XL  1973\u003cbr\u003e\nHarley Davidson XL  1974\u003cbr\u003e\nHarley Davidson XL  1975\u003cbr\u003e\nHarley Davidson XL  1976\u003cbr\u003e\nHarley Davidson XL  1977\u003cbr\u003e\nHarley Davidson XL  1978\u003cbr\u003e\nHarley Davidson XL  1979\u003cbr\u003e\nHarley Davidson XL  1980\u003cbr\u003e\nHarley Davidson XL  1981\u003cbr\u003e\nHarley Davidson XL  1982\u003cbr\u003e\nHarley Davidson XL  1983\u003cbr\u003e\nHarley Davidson XL  1984\u003cbr\u003e\nHarley Davidson XL  1985\u003c\/p\u003e","brand":"Manley","offers":[{"title":"Default Title","offer_id":44656956801066,"sku":"11-9609","price":104.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-9609a.jpg?v=1786001584","url":"https:\/\/atticusgoods.com\/products\/manley-valve-spring-set-part-number-99217-for-harley-davidson-xl-1957-1966","provider":"Atticus Goods","version":"1.0","type":"link"}