{"product_id":"manley-chevy-l83-5-3l-1-560in-head-diameter-pro-flo-extreme-duty-exhaust-valves-set-of-8","title":"Manley Chevy L83 5.3L 1.560in Head Diameter Pro Flo\/Extreme Duty Exhaust Valves (Set of 8) - 12363-8","description":"\u003cp\u003eDiscover the extraordinary capabilities of Manley Performance Products' Extreme Duty Series Valves. Engineered to cater to the demanding needs of Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors, these valves are your ticket to unparalleled performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIdeal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.\u003c\/li\u003e\n\u003cli\u003eXH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material construction.\u003c\/li\u003e\n\u003cli\u003eBuilt to Last: Featuring chrome stems and hard tips for exceptional longevity and wear resistance.\u003c\/li\u003e\n\u003cli\u003eOptimized Performance: Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManley Valve\u003c\/li\u003e\n\u003cli\u003eExhaust, Valve-E\/D L83 53L 1.560, .3136 STEM\u003c\/li\u003e\n\u003cli\u003eExhaust, Valve-E\/D L83 5.3L 1.560, .3136 STEM\u003c\/li\u003e\n\u003cli\u003eUnderhead Radius: 7\/16\u003c\/li\u003e\n\u003cli\u003eValve Series: Extreme Duty Series\u003c\/li\u003e\n\u003cli\u003eValve Material: Inconel\u003c\/li\u003e\n\u003cli\u003eValve Type: Exhaust\u003c\/li\u003e\n\u003cli\u003eProduct Type: Engine Exhaust Valve Kit\u003c\/li\u003e\n\u003cli\u003eValve Quantity: 8\u003c\/li\u003e\n\u003cli\u003eEngine Valve Quantity: 8\u003c\/li\u003e\n\u003cli\u003eIndustry: Automotive\u003c\/li\u003e\n\u003cli\u003eOut of Stock Message: Call for Availability\u003c\/li\u003e\n\u003cli\u003eTitle: Manley Valve - Exhaust, Valve-E\/D L83 5.3L 1.560, .3136 STEM\u003c\/li\u003e\n\u003cli\u003eProp 65 Yes\/No: Yes\u003c\/li\u003e\n\u003cli\u003eProp 65 (C, R or CR): CR\u003c\/li\u003e\n\u003cli\u003eProp 65 - Short Label: Prop 65 Warning Label.JPG\u003c\/li\u003e\n\u003cli\u003eEngine Type: ICE\u003c\/li\u003e\n\u003cli\u003eMake: Chevrolet\u003c\/li\u003e\n\u003cli\u003eEngine: 5.3L L83\u003c\/li\u003e\n\u003cli\u003eProduct Market: Domestic\u003c\/li\u003e\n\u003cli\u003eHead Diameter: 1.560\u003c\/li\u003e\n\u003cli\u003eValve Head Diameter: 1.560\u003c\/li\u003e\n\u003cli\u003eStem Diameter: 0.3136\u003c\/li\u003e\n\u003cli\u003eValve Stem Diameter: 0.3136\u003c\/li\u003e\n\u003cli\u003eO\/A Length: 5.208\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":52481022001515,"sku":"MAN12363-8","price":719.71,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/9690\/4998\/files\/public_5ad2da97-f4a4-47f4-b9a6-47e2877fd128.jpg?v=1778202267","url":"https:\/\/www.raptorracing.ca\/products\/manley-chevy-l83-5-3l-1-560in-head-diameter-pro-flo-extreme-duty-exhaust-valves-set-of-8","provider":"Raptor Racing","version":"1.0","type":"link"}