{"product_id":"fed-pac-ls-dual-spring-kit-700-lift-copy","title":"FED Dual Conical .700 Lift Valve Spring Kit","description":"\u003cp class=\"x_MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eNEW FED Dual Conical .700 Spring Kit\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eThe NEW FED Dual Conical .700 Spring Kit is the go-to choice for LS aftermarket performance engines. Designed for high-RPM naturally aspirated and boosted applications, this spring kit delivers improved valve-train stability, reduced mass, and increased RPM capability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eWhile some may say a valve spring is simply a valve spring, performance comes down to what the spring can do for your application. At FED, our formula is simple: \u003cb\u003elighter mass, non-interference, increased valve-train stability, and more RPM.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eFeaturing an \u003cb\u003eovate conical design\u003c\/b\u003e, the FED Dual Conical spring uses a smaller-diameter retainer that is approximately \u003cb\u003e5 grams lighter\u003c\/b\u003e than our standard FED .700 dual spring. The non-interference design also reduces spring-to-spring contact, minimizing heat generated by rubbing friction. This helps promote longer spring life and improved durability in demanding applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eThe spring kit is available for both \u003cb\u003estock valve guides (.505\")\u003c\/b\u003e and \u003cb\u003ebronze valve guides (.565\")\u003c\/b\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eEach kit includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"x_MsoNormal\"\u003e\u003cspan\u003eHigh-grade titanium retainers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"x_MsoNormal\"\u003e\u003cspan\u003eBlack oxide steel locators\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"x_MsoNormal\"\u003e\u003cspan\u003e7mm GM valve locks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"x_MsoNormal\"\u003e\u003cspan\u003eDrop-in fitment for stock and aftermarket cylinder heads\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eWhether you're building a high-RPM naturally aspirated combination or a serious, boosted LS engine, the \u003cb\u003eFED Dual Conical .700 Spring Kit\u003c\/b\u003e is engineered to provide the stability, durability, and RPM capability your valve train demands.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eKit includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eFED Dual Conical .700 dual spring (16)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eGM LS locks (32)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eTitanium retainers (16)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eLocators for stock or bronze guides (16)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eViton High Heat Valve Seals (16)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eSpring specs:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eMax Valve Lift: .700\" \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eInstalled Height: 1.800\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eSeat Pressure: 179 lbs @ 1.800\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eOpen Pressure: 490 lbs @ 1.100\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eSpring Rate: 444 lbs\/in\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eCoil Bind Height: .975”\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eOuter O.D.: 1.153\" Top of spring \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"x_MsoNormal\"\u003e\u003cspan\u003eOuter O.D.: 1.315\" Bottom of spring\u003c\/span\u003e\u003c\/p\u003e","brand":"Frankenstein Engine Dynamics","offers":[{"title":"OEM .505 Powder Metal Guide","offer_id":71165507567869,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true},{"title":"OEM .565 Bronze Guide","offer_id":71165507600637,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true},{"title":"M311 .565 Guide","offer_id":71165507633405,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true},{"title":"F-Series .565 Guide","offer_id":71165507666173,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/7489\/5101\/files\/DualConical2.jpg?v=1787239255","url":"https:\/\/frankensteined.net\/products\/fed-pac-ls-dual-spring-kit-700-lift-copy","provider":"Frankenstein Engine Dynamics","version":"1.0","type":"link"}