{"product_id":"manley-man221425-16","title":"Manley MAN221425-16","description":"\u003cstrong\u003eMANLEY NEXTEK DUAL VALVE SPRINGS 1.640\" O.D X .860\" I.D. 604 LBS\/IN MAN221425-16\u003c\/strong\u003eThese Manley NexTek valve springs are better-designed valve springs using state-of-the-art machinery for purpose-built racing engines. They're manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature a proprietary, multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. The Manley NexTek valve springs are smaller diameter and lightweight, allowing engines to rev higher faster. They have an extended tip thickness designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading. \u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003cdiv\u003eNumber of Springs Per Valve: Dual \u003cdiv\u003eOutside Diameter of Outer Spring (in): 1.640 in. \u003c\/div\u003e\n\u003cdiv\u003eCoil Bind Height (in): 1.150 in. \u003c\/div\u003e\n\u003cdiv\u003eDamper Spring Included: No \u003c\/div\u003e\n\u003cdiv\u003eSpring Rate (lbs\/in): 604 lbs.\/in. \u003c\/div\u003e\n\u003cdiv\u003eInside Diameter of Outer Spring (in): 1.185 in. \u003c\/div\u003e\n\u003cdiv\u003eInside Diameter of Inner Spring (in): 0.860 in. \u003c\/div\u003e\n\u003cdiv\u003eValve Spring Style: Standard \u003c\/div\u003e\n\u003cdiv\u003eCoated: No \u003c\/div\u003e\n\u003cdiv\u003eQuantity: Sold as a set of 16.\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"Manley","offers":[{"title":"Default Title","offer_id":44542788993335,"sku":"MAN221425-16","price":743.75,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/101387.jpg?v=1780426482","url":"https:\/\/enginemaster.com.au\/products\/manley-man221425-16","provider":"Engine Master","version":"1.0","type":"link"}