{"product_id":"dual-valve-spring-kit-4","title":"Dual Valve Spring Kit","description":"These springs undergo a gas nitriding process before shot peening, which enhances their fatigue life.\n\nThis kit features dual springs with specific performance characteristics, including a maximum lift of 12.70mm, a seat pressure of 80lbs at 35.70mm, and an open pressure of 195lbs at 10mm. The coil bind is rated at 20.70mm, with inner springs measuring 20.50mm OD and 15.50mm ID, and outer springs measuring 29.65mm OD and 21.85mm ID. The spring rate is 11.50lbs\/mm.\n\nThe kit includes 24 springs, 24 retainers, and 24 seat locators. It is designed for multiple BMW engine applications, including the S42, M42, M50, S50, M52, and M54 series engines, covering model years from 1990 to 2006. Specific applications listed include the BMW 520i (1990-2005), 320i (1991-2006), Z3 2.2i (2000-2002), Z3M (1998-2000), Z4 2.2i (2003-2005), and M3 (1994-1999).\n\nDue to the nature of performance engine applications, these parts are sold without any express warranty or implied warranty of merchantability or fitness for a particular purpose.","brand":"Supertech","offers":[{"title":"Default Title","offer_id":52663922852152,"sku":"SPRK-H1000D\/BM","price":833.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687720563.jpg?v=1784330865","url":"https:\/\/store.motormia.co\/products\/dual-valve-spring-kit-4","provider":"MOTORMIA","version":"1.0","type":"link"}