{"product_id":"manley-gm-ls-series-660in-max-lift-valve-spring-and-retainer-kit","title":"Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit","description":"\u003cp\u003eManley Performance LS \u0026amp; LT NexTek? valve spring kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs provide exceptional fatigue resistance and high-tensile strength, ensuring consistent valve control at extreme RPMs. Save time and money with these all-inclusive kits, featuring premium springs, retainers, I.D. locators, locks, and Viton? seals.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManley LS and LT Valve Spring Kits provide a complete, engineered solution, ensuring seamless compatibility for higher-lift camshafts and eliminating concerns with mismatched components.\u003c\/li\u003e\n\u003cli\u003eNexTek  Valve Springs are manufactured from \"super clean\" Hi-Tensile Chrome Silicon steel and shot-peened to MIL spec for maximum fatigue life. Spring No. 221436-16\u003c\/li\u003e\n\u003cli\u003e7  Machined Valve Locks use the highest quality steel alloy and are heat treated and black oxide finished. For 8mm (.3135\") valve stem. Lock No. 13098-16\u003c\/li\u003e\n\u003cli\u003e7  Steel Retainer CNC machined to exacting tolerances and made of thru-hardened 4140 chromoly. Retainer No. 23621-16 (+.050\" Installed Height)\u003c\/li\u003e\n\u003cli\u003eI.D. Valve Spring Locator is CNC machined, heat treated, and black oxide finished. Locator No. 42334-16 (.505\" ID)\u003c\/li\u003e\n\u003cli\u003eViton Valve Stem Seals offer exceptional resistance to heat, chemicals, and oils. Seal No. 24042-16\u003c\/li\u003e\n\u003cli\u003eNote: Max. lift figures above may vary depending upon the cylinder head and installed height.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":41085821485127,"sku":"MAN26362134KS","price":459.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/5069\/3703\/files\/5191b24b2e8e9fe43b3b404b01d13d5fL.jpg?v=1731010380","url":"https:\/\/raceonlyparts.com\/products\/manley-gm-ls-series-660in-max-lift-valve-spring-and-retainer-kit","provider":"Race Only Parts","version":"1.0","type":"link"}