{"product_id":"660-polished-dual-valve-spring-kit","title":".660\" Polished Dual Valve Spring Kit","description":"The Texas Speed \u0026amp; Performance TSP .660\" Polished Dual Valve Spring Kit represents the latest in valve spring technology, developed in partnership with PAC Racing.\n\nThis kit features American-Made PAC Racing polished dual valve springs, rated to .660\" lift, paired with lightweight titanium retainers. A standout component is the patent-pending Precision Race Components integrated seat and seal, which simplifies installation by eliminating the need for special tools and reducing the risk of valve seal damage or displacement. This innovative design is compatible with factory-size valve guides.\n\nTechnical specifications include an install height of 1.810\" with a closed spring pressure of 160 lb. at that height. The springs provide 415 lb. of open pressure at .660\" lift, with a coil bind occurring at 1.015\". The polishing process by PAC Racing enhances spring longevity and prevents fatigue without compromising pressure ratings.\n\nIt is important to note that this dual valve spring kit utilizes GM factory valve stem locks, which are not included. Furthermore, this kit will not work on LS7, LS9, any Gen 5 LT1\/4 engine applications, and most aftermarket cylinder heads that use bronze guides.","brand":"Texas Speed","offers":[{"title":"Default Title","offer_id":52663967809848,"sku":"199-PACPOL660SpringKit","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687158000.webp?v=1784331344","url":"https:\/\/store.motormia.co\/products\/660-polished-dual-valve-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}