{"product_id":"manley-big-block-chevrolet-extreme-duty-exhaust-valve-5-522in-overall-l-1-900in-diameter-set-of-8","title":"Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter Set of 8 - 12739-8","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-BBC E\/D 1.900, +100\u003c\/li\u003e\n\u003cli\u003eExhaust, Valve-BBC E\/D 1.900, +.100\u003c\/li\u003e\n\u003cli\u003eProduct Market: Domestic\u003c\/li\u003e\n\u003cli\u003eHead Diameter: 1.900\u003c\/li\u003e\n\u003cli\u003eValve Head Diameter: 1.900\u003c\/li\u003e\n\u003cli\u003eStem Diameter: 0.3415\u003c\/li\u003e\n\u003cli\u003eValve Stem Diameter: 0.3415\u003c\/li\u003e\n\u003cli\u003eO\/A Length: 5.522\u003c\/li\u003e\n\u003cli\u003eValve Length: 5.522\u003c\/li\u003e\n\u003cli\u003eValve Tip Length: 0.250\u003c\/li\u003e\n\u003cli\u003eTip Length: 0.250\u003c\/li\u003e\n\u003cli\u003eMargin Width: 0.075\u003c\/li\u003e\n\u003cli\u003eSeat Width: 0.085\u003c\/li\u003e\n\u003cli\u003eTop of Head: 12 Degree Dish\u003c\/li\u003e\n\u003cli\u003eValve Head Shape: 12 Degree Dish\u003c\/li\u003e\n\u003cli\u003eUnderhead Angle: 18.00\u003c\/li\u003e\n\u003cli\u003eUnderhead Radius: 1\/2\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\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":52481022853483,"sku":"MAN12739-8","price":719.71,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/9690\/4998\/files\/public_1b0b3a2f-6815-43ad-ab05-f5be1b881b39.jpg?v=1778202249","url":"https:\/\/www.raptorracing.ca\/products\/manley-big-block-chevrolet-extreme-duty-exhaust-valve-5-522in-overall-l-1-900in-diameter-set-of-8","provider":"Raptor Racing","version":"1.0","type":"link"}