{"product_id":"manley-chevrolet-5-3l-l83-exhaust-valve-kit-1-560in-head-dia-5-208in-o-a-length-0-3136in-stem","title":"Manley Chevrolet 5.3L L83 Exhaust Valve Kit - 1.560in Head Dia. 5.208in O\/A Length, 0.3136in Stem - 12359-8","description":"\u003cp\u003eManley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.\u003c\/li\u003e\n\u003cli\u003eChrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.\u003c\/li\u003e\n\u003cli\u003eSwirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.\u003c\/li\u003e\n\u003cli\u003eVariety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.\u003c\/li\u003e\n\u003cli\u003eRecommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.\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-R\/M L83 53L 1.560, .3136 STEM\u003c\/li\u003e\n\u003cli\u003eExhaust, Valve-R\/M L83 5.3L 1.560, .3136 STEM\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\u003cli\u003eValve Length: 5.208\u003c\/li\u003e\n\u003cli\u003eValve Tip Length: 0.160\u003c\/li\u003e\n\u003cli\u003eTip Length: 0.160\u003c\/li\u003e\n\u003cli\u003eMargin Width: 0.065\u003c\/li\u003e\n\u003cli\u003eSeat Width: 0.110\u003c\/li\u003e\n\u003cli\u003eTop of Head: 18 Degree Dish\u003c\/li\u003e\n\u003cli\u003eValve Head Shape: 18 Degree Dish\u003c\/li\u003e\n\u003cli\u003eUnderhead Angle: 25.00\u003c\/li\u003e\n\u003cli\u003eUnderhead Radius: 7\/16\u003c\/li\u003e\n\u003cli\u003eValve Series: Race Series\u003c\/li\u003e\n\u003cli\u003eValve Sub-Series: Race Master\u003c\/li\u003e\n\u003cli\u003eValve Material: Stainless Steel\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\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":52481021739371,"sku":"MAN12359-8","price":264.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/9690\/4998\/files\/public_fa0103a3-34cd-45ee-8d3f-e339e7e7bc01.jpg?v=1778202272","url":"https:\/\/www.raptorracing.ca\/products\/manley-chevrolet-5-3l-l83-exhaust-valve-kit-1-560in-head-dia-5-208in-o-a-length-0-3136in-stem","provider":"Raptor Racing","version":"1.0","type":"link"}