{"product_id":"dual-valve-spring-and-retainer-kit-1","title":"Dual Valve Spring and Retainer Kit","description":"The Supertech valve spring and retainer kit provides a complete valvetrain upgrade for the 2000-2009 Honda S2000 and 2002-2004 Acura RSX Type-S (K20A2 engine). These precision-matched components are developed for performance enthusiasts seeking increased reliability, quality, and responsiveness during high-RPM operation.\n\nEach kit features dual valve springs manufactured from an extreme pure chrome-silicon-vanadium-steel alloy, which provides excellent fatigue resistance for performance engines. Technical specifications include a seat pressure of 95 lbs at 26.5mm, an open pressure of 261 lbs at 12mm, and a maximum net lift of 17.7mm, with a coil bind height of 22.7mm. The inner springs feature a 21.3mm outer diameter and 15.5mm inner diameter, while the outer springs have a 30mm outer diameter and 21.8mm inner diameter, with a spring rate of 13.2 lbs\/mm.","brand":"Supertech","offers":[{"title":"Default Title","offer_id":52663922786616,"sku":"SPRK-H1021D-T1","price":606.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687720566.jpg?v=1784330864","url":"https:\/\/store.motormia.co\/products\/dual-valve-spring-and-retainer-kit-1","provider":"MOTORMIA","version":"1.0","type":"link"}