{"product_id":"manley-chevy-ls-3-l-99-small-block-l-92-head-2-165-pro-flo-hollow-stem-intake-valves-set-of-8","title":"Manley Chevy LS-3\/L-99 Small Block (L-92 Head) 2.165 Pro Flo Hollow Stem Intake Valves (Set of 8) - 11686H-8","description":"\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\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\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\u003cli\u003eExotic alloys for superior tensile strength, reliability, and longevity\u003c\/li\u003e\n\u003cli\u003eSwirl polishing and machined faces improved airflow\/optimized efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHead Diameter: 2.165 in\u003c\/li\u003e\n\u003cli\u003eStem Diameter: 0.3133 in\u003c\/li\u003e\n\u003cli\u003eO\/A : 4.900 in\u003c\/li\u003e\n\u003cli\u003eHollow Stem\u003c\/li\u003e\n\u003cli\u003eManley Valve\u003c\/li\u003e\n\u003cli\u003eIntake, Valve-L-92 P\/F 2.165 HOLLOW\u003c\/li\u003e\n\u003cli\u003eProduct Market: Domestic\u003c\/li\u003e\n\u003cli\u003eHead Diameter: 2.165\u003c\/li\u003e\n\u003cli\u003eValve Head Diameter: 2.165\u003c\/li\u003e\n\u003cli\u003eStem Diameter: 0.3133\u003c\/li\u003e\n\u003cli\u003eValve Stem Diameter: 0.3133\u003c\/li\u003e\n\u003cli\u003eO\/A Length: 4.900\u003c\/li\u003e\n\u003cli\u003eValve Length: 4.900\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: 0.055\u003c\/li\u003e\n\u003cli\u003eSeat Width: 0.100\u003c\/li\u003e\n\u003cli\u003eTop of Head: 7 Degree Dish\u003c\/li\u003e\n\u003cli\u003eValve Head Shape: 7 Degree Dish\u003c\/li\u003e\n\u003cli\u003eUnderhead Angle: Pro Flo: 12.00\u003c\/li\u003e\n\u003cli\u003eUnderhead Radius: 3\/8\u003c\/li\u003e\n\u003cli\u003eCylinder Head: LS3\/L92\u003c\/li\u003e\n\u003cli\u003eValve Series: Severe Duty? Series\u003c\/li\u003e\n\u003cli\u003eValve Sub-Series: Pro Flo\u003c\/li\u003e\n\u003cli\u003eValve Material: Stainless Steel\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":52480990675307,"sku":"MAN11686H-8","price":694.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/9690\/4998\/files\/5f4b70fa0b8a870e0877005e4b8d1853_a301451d-3dc5-454e-98cb-2bebaa183918.jpg?v=1761049139","url":"https:\/\/www.raptorracing.com\/products\/manley-chevy-ls-3-l-99-small-block-l-92-head-2-165-pro-flo-hollow-stem-intake-valves-set-of-8","provider":"Raptor Racing","version":"1.0","type":"link"}