{"product_id":"manley-performance-man221431-16-nextek-valve-spring-single-hemi","title":"Manley Performance MAN221431-16 NexTek Valve Spring, Single Hemi","description":"From drag strips to short track and endurance circuits, the Manley NexTek® series is engineered for serious racers. NexTek® springs resist pressure loss and valve-train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high-RPM performance. Built to outperform and outlast in real-world competition.\nManley Valve Spring, SPRING-1.311 SINGLE HEMI.\n\u003cul\u003e\n  \u003cli\u003eTightly controlled open-end flatness reduces valve stem side loading\u003c\/li\u003e\n  \u003cli\u003eManufactured from “super clean” Hi-Tensile Chrome Silicon steel\u003c\/li\u003e\n  \u003cli\u003eProprietary multi-step heat treating minimizes load loss\u003c\/li\u003e\n  \u003cli\u003eTip thickness designed to eliminate overload breakage\u003c\/li\u003e\n  \u003cli\u003eShot-peened to MIL spec for max fatigue life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Manley Performance MAN221431-16 NexTek valve spring is engineered for serious racing applications, from drag strips and short tracks to endurance circuits. Designed to maintain consistent spring force under demanding race conditions, it helps reduce valve bounce and support valve-train stability during high-RPM operation.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent spring force:\u003c\/strong\u003e NexTek technology is designed to resist pressure loss during demanding racing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced valve-train degradation:\u003c\/strong\u003e Proprietary multi-step heat treating minimizes load loss over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved valve-train stability:\u003c\/strong\u003e Consistent performance helps reduce valve bounce during high-RPM operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced fatigue life:\u003c\/strong\u003e Shot peening to MIL specification supports durability in competition use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Product Specifications \u0026amp; Technical Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Manley Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MAN221431-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Valve spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e NexTek\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Single Hemi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hi-Tensile Chrome Silicon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing treatment:\u003c\/strong\u003e Proprietary multi-step heat treating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface treatment:\u003c\/strong\u003e Shot-peened to MIL specification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eOne Manley Performance NexTek single Hemi valve spring.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":68054826057980,"sku":"221431-16","price":492.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/a22d350260fa0977a7681591b40d6b2bL.jpg?v=1793529537","url":"https:\/\/diycustoms.store\/products\/manley-performance-man221431-16-nextek-valve-spring-single-hemi","provider":"diycustoms.store","version":"1.0","type":"link"}