{"product_id":"dual-valve-spring-kit-with-retainers-and-locators","title":"Dual Valve Spring Kit with Retainers and Locators","description":"The Supertech Dual Valve Spring Kit (SPRK-MM18D) offers a comprehensive solution for valvetrain enhancement in the 1994-1997 Mazda MX-5 Miata equipped with the 1.8L engine.\n\nEach spring undergoes a gas nitriding process before shot peening to improve its fatigue life. The kit includes 16 springs, 16 retainers (RET-TS60\/MA2), and 16 seat locators (SEAT-TS\/MA18I).\n\nKey specifications for these springs include a seat pressure of 85 lbs @ 33.60, an open pressure of 205 lbs @ 10, a maximum lift of 12.90mm, and a coil bind measurement of 20.70mm. The spring rate is 12.1, with inner spring dimensions of 15.20mm ID and 20.00mm OD, and outer spring dimensions of 20.00mm ID and 27.50mm OD.","brand":"Supertech","offers":[{"title":"Default Title","offer_id":52663921934648,"sku":"SPRK-MM18D","price":510.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687720570.jpg?v=1784330856","url":"https:\/\/store.motormia.co\/products\/dual-valve-spring-kit-with-retainers-and-locators","provider":"MOTORMIA","version":"1.0","type":"link"}