{"product_id":"pac-121-16-1-270-in-od-0-640-in-locating-diameter-0-520-in-id-0-060-in-thickness","title":"PAC-121-16 1.270 in. OD – 0.640 in. Locating Diameter – 0.520 in. ID – 0.060 in. Thickness","description":"\u003cp\u003e1.270 in. OD – 0.640 in. Locating Diameter – 0.520 in. ID – 0.060 in. Thickness\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eOutside Diameter    \u003cbr\u003e1.270 IN\u003c\/p\u003e\n\u003cp\u003eFirst Step Diameter    \u003cbr\u003e0.640 IN\u003c\/p\u003e\n\u003cp\u003eSecond Step Diameter    \u003cbr\u003e0.520 IN\u003c\/p\u003e\n\u003cp\u003eMaterial    \u003cbr\u003eChrome Moly\u003c\/p\u003e\n\u003cp\u003ePAC Racing Valve Spring Seats and Cups\u003c\/p\u003e\n\u003cp\u003ePAC Racing valve spring seats and cups are a great way to prevent dancing springs, which would tear up your aluminum heads. High-performance racing engines place extreme pressure on the springs. These retainers are essential for use on aluminum heads. They fit the inside or outside diameter of the springs, preventing spring seat movement.\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67722922361145,"sku":"PAC-S121-16","price":86.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/S128_53a4614f-86c6-40f9-8279-8b01b78c8453.png?v=1792511246","url":"https:\/\/3vperformance.com\/products\/pac-121-16-1-270-in-od-0-640-in-locating-diameter-0-520-in-id-0-060-in-thickness","provider":"3V Performance","version":"1.0","type":"link"}