{"product_id":"manley-chevy-l83-53l-1560in-head-diameter-pro-flosevere-duty-exhaust-valve-set-of-8-430936-t14","title":"Manley Chevy L83 5.3L 1.560in Head Diameter Pro Flo\/Severe Duty Exhaust Valve (Set of 8)","description":"\u003ch3\u003e\u003cstrong\u003eManufacturer Part # : 12361-8\u003c\/strong\u003e\u003c\/h3\u003e\u003cbr\u003e\u003ch2\u003eMarket Description\u003c\/h2\u003e\n\u003cp\u003eManley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400°F, Manley exhaust valves endured 100 million cycles, while competitors failed after just 100,000, proving a 1,000× longer fatigue life. Each valve features chrome stems, hard tips, and swirl-polished underheads with fully machined combustion faces for superior airflow, efficiency, and wear resistance. Built for those who demand race-winning strength and precision, Manley Severe Duty® Valves set the industry standard for performance and endurance.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Description - Short\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eManley Chevy L83 5.3L 1.560in Head Diameter Pro Flo\/Severe Duty Exhaust Valve (Set of 8)\u003c\/li\u003e\n  \u003cli\u003eValve - Exhaust\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eLabel Description\u003c\/h2\u003e\n\u003cp\u003eSevere Dty Chevy 5.3L L83 Ex. Vlv Kt-1.560 in. Dia.,5.208 in. O\/A ,.3136 in. Stm\u003c\/p\u003e\n\n\u003ch2\u003eFeatures and Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSwirl polishing and machined faces improved airflow\/optimized efficiency\u003c\/li\u003e\n  \u003cli\u003eExotic alloys for superior tensile strength, reliability, and longevity\u003c\/li\u003e\n  \u003cli\u003eProven fatigue strength for extreme performance\u003c\/li\u003e\n  \u003cli\u003eChrome stems and hard tips enhance durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAssociated Comments\u003c\/h2\u003e\n\u003cp\u003eManley Valve - Exhaust, Valve-S\/D L83 5.3L 1.560, .3136 STEM.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Description - Long\u003c\/h2\u003e\n\u003cp\u003eManley Valve - Exhaust, Valve-S\/D L83 5.3L 1.560, .3136 STEM\u003c\/p\u003e\n\n\u003ch2\u003eProduct Description - Extended\u003c\/h2\u003e\n\u003cp\u003eManley Valve - Exhaust, Valve-S\/D L83 53L 1.560, .3136 STEM\u003c\/p\u003e\n\n\u003ch2\u003eProduct Description - Invoice\u003c\/h2\u003e\n\u003cp\u003eValve-S\/D L83 5.3L 1.560, .3136 STEM\u003c\/p\u003e\n\n\u003ch2\u003eAAIA Part Type Description\u003c\/h2\u003e\n\u003cp\u003eEngine Exhaust Valve\u003c\/p\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":47189732786314,"sku":"T14.430936","price":526.0,"currency_code":"NZD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0688\/4599\/4122\/files\/c2008e4f5a51a63cc4bb171d46e63bb4_6f377885-f344-4e5a-82e6-f72f9697efad.jpg?v=1760712177","url":"https:\/\/qjipdu-tf.myshopify.com\/products\/manley-chevy-l83-53l-1560in-head-diameter-pro-flosevere-duty-exhaust-valve-set-of-8-430936-t14","provider":"SBX Performance","version":"1.0","type":"link"}