{"product_id":"manley-pro-flo-severe-duty-exhaust-valves-chevy-6-2l-lt1-head-1-590-man-12347-8","title":"MANLEY PRO FLO \/ SEVERE DUTY EXHAUST VALVES CHEVY 6.2L LT1 HEAD 1.590","description":"\u003ch2\u003eMANLEY PRO FLO \/ SEVERE DUTY EXHAUST VALVES CHEVY 6.2L LT1 HEAD 1.590 Product Description:\u003c\/h2\u003e\n\u003cdiv class=\"seocart_Accordion\"\u003e\n\u003ch3 class=\"seocart_Accordion_heading0\"\u003eOverview\u003c\/h3\u003e\n\u003cdiv class=\"seocart_Accordion_content0\"\u003e\n\u003cp style=\"color: #353535;\"\u003e\u003cspan style=\"color: #000000;\"\u003eManley Performance is indisputably a leading manufacturer of performance and racing components in the world. The reason for Manley's overwhelming success is simple: Quality. Manley offers the best materials in the industry exclusive materials that other manufacturers do not possess. Manley's valve stems are hard coated with .0002'' thick chrome rather than a few millionths of flash.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"color: #353535;\"\u003e\u003cspan style=\"color: #000000;\"\u003eManley's hard valve tips are superior to competitors' puddled ''stellite'' which can crack and erode off the stem. Manley's valve head and under head shapes have been in the forefront of the quest for improved flow since the late 1960's.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"color: #353535;\"\u003e\u003cspan style=\"color: #000000;\"\u003eRace Master and the Pro Flo versions identified as Race Flo valves, are manufactured of XH-426 material for the exhausts and NK-842 for the intakes. This series of valves is targeted at the bracket, drag and oval track racers operating below 8000 rpm - above which engine speed titanium valves are generally required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"color: #353535;\"\u003e\u003cspan style=\"color: #000000;\"\u003eAny engine builder successfully using EV-8 alloy (21-4N) valves will find in this series of Manley valves a superior piece at a most attractive price. The Ultimate Tensile Strength charts on this page and the next, show the Manley Race Series to be equal to the best that the competitors have to offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSet of 8.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003chr style=\"color: #222222; text-align: left;\"\u003e\n\n\u003c\/div\u003e\n\u003ch3 class=\"seocart_Accordion_heading1\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"seocart_Accordion_content1\"\u003e\u003ctable height=\"221\" style=\"width: 428px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #000000;\"\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px; text-align: left;\"\u003e\u003cspan style=\"color: #800000;\"\u003e\u003ca href=\"\/brands\/manley-performance-products-inc.-1.html\" style=\"color: #800000;\"\u003eManley Performance Products\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px; text-align: left;\"\u003e\u003cspan style=\"color: #000000;\"\u003eMAN-12347-8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eOther Part Number:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px; text-align: left;\"\u003e\u003cspan style=\"color: #000000;\"\u003e12347-8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003ePart Type:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px; text-align: left;\"\u003e\n\u003ca href=\"\/engine-internal\/pistons-rings-and-rods-1.html\"\u003e\u003c\/a\u003e\u003ca href=\"\/cylinder-heads\/valves-1.html\"\u003e\u003cspan style=\"color: #800000;\"\u003eValves\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/engine-internal\/pistons-rings-and-rods-1.html\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eValve Type:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003eExhaust\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eHead Diameter (in):\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e1.590\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eStem \u003cspan\u003eDiameter\u003c\/span\u003e (in):\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e.3136\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eInstalled Height:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003eStock\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eO\/A Length (in):\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e5.205\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eTip \u003cspan\u003eLength (in)\u003c\/span\u003e:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e.160\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003eUnderhead Angle\/Radius (deg\/in):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e25° x 7\/16\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003eMargin (in):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e.075\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003eSeat Width (in):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e.100\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003eTop of Head (deg):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e18° Dish\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003e\u003cspan\u003eValve Back Cut (in\/deg):\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan\u003e.075\" x 30°\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 207.797px; text-align: right;\"\u003e\n\u003cstrong style=\"background-color: #f9f9f9;\"\u003e\u003cspan style=\"color: #111111;\"\u003e\u003cspan color=\"#111111\" style=\"color: #111111;\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eValve Material:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px;\"\u003eXH-426\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003e\u003cspan color=\"#111111\" style=\"color: #111111;\"\u003eValve Weight (Gms): \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003e97\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 19px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #111111;\"\u003e\u003cspan\u003eQuantity:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 19px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 19px;\"\u003e\u003cspan style=\"color: #000000;\"\u003eSold as a set of 8.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 22px; text-align: left;\"\u003e\n\u003ctd style=\"width: 207.797px; height: 22px; text-align: right;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eIn Store Pickup:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 9.01562px; height: 22px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 189.188px; height: 22px;\"\u003e\u003cspan style=\"color: #000000;\"\u003eColton, CA, USA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3 class=\"seocart_Accordion_heading2\"\u003eApplication\u003c\/h3\u003e\n\u003cdiv class=\"seocart_Accordion_content2\"\u003e\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eGM\/Chevy 6.2L LT1 style cylinder heads.\u003c\/span\u003e\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"seocart_Accordion_heading4\"\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"seocart_Accordion_content4\"\u003e\u003cp\u003e\u003cspan style=\"color: #111111; background-color: #ffffff;\"\u003eManley products, due to their intended use, are sold without warranty.\u003c\/span\u003e\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Manley Performance Products Inc.","offers":[{"title":"Default Title","offer_id":43730475352161,"sku":"MAN-12347-8","price":301.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/5157\/5137\/files\/zMAN-12347-8-exhaust-1.jpg?v=1772591274","url":"https:\/\/www.coreperformanceinc.com\/products\/manley-pro-flo-severe-duty-exhaust-valves-chevy-6-2l-lt1-head-1-590-man-12347-8","provider":"Core Performance Inc","version":"1.0","type":"link"}