{"product_id":"manley-12354h-8-valve-intake-valve-l-92-p-f-2-165-300-hollow","title":"Manley 12354H-8 - Chevrolet L-99 intake Valve Kit - 2.165in Head Dia. 5.200in O\/A Length, 0.3133in Stem","description":"\u003cp\u003eManley 12354H-8 - Chevrolet L-99 intake Valve Kit - 2.165in Head Dia. 5.200in O\/A Length, 0.3133in Stem\u003c\/p\u003e\u003cp\u003eManley Valve - Intake, Valve-L-92 P\/F 2.165, +.300 HOLLOW\u003c\/p\u003e\u003cp\u003eHead Diameter: 2.165 in. - Stem Diameter: 0.3133 in. - O\/A : 5.200 in. - Hollow Stem\u003c\/p\u003e\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\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\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: \u003cspan\u003e2.165\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Head Diameter\u003c\/strong\u003e: \u003cspan\u003e2.165\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStem Diameter\u003c\/strong\u003e: \u003cspan\u003e0.3133\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Stem Diameter\u003c\/strong\u003e: \u003cspan\u003e0.3133\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProduct Market\u003c\/strong\u003e: \u003cspan\u003eDomestic\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eO\/A Length\u003c\/strong\u003e: \u003cspan\u003e5.200\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Length\u003c\/strong\u003e: \u003cspan\u003e5.200\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Tip Length\u003c\/strong\u003e: \u003cspan\u003e0.160\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTip Length\u003c\/strong\u003e: \u003cspan\u003e0.160\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMargin Width\u003c\/strong\u003e: \u003cspan\u003e0.055\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSeat Width\u003c\/strong\u003e: \u003cspan\u003e0.100\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTop of Head\u003c\/strong\u003e: \u003cspan\u003e7 Degree Dish\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Head Shape\u003c\/strong\u003e: \u003cspan\u003e7 Degree Dish\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eUnderhead Angle\u003c\/strong\u003e: \u003cspan\u003ePro Flo: 12.00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eUnderhead Radius\u003c\/strong\u003e: \u003cspan\u003e3\/8\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Head\u003c\/strong\u003e: \u003cspan\u003eL92 Cylinder Head\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Series\u003c\/strong\u003e: \u003cspan\u003eSevere Duty? Series\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Sub-Series\u003c\/strong\u003e: \u003cspan\u003ePro Flo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Material\u003c\/strong\u003e: \u003cspan\u003eStainless Steel\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: \u003cspan\u003eIntake\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: \u003cspan\u003eEngine Intake Valve Kit\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Quantity\u003c\/strong\u003e: \u003cspan\u003e8\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine Valve Quantity\u003c\/strong\u003e: \u003cspan\u003e8\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIndustry\u003c\/strong\u003e: \u003cspan\u003eAutomotive\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOut of Stock Message\u003c\/strong\u003e: \u003cspan\u003eCall for Availability\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine Type\u003c\/strong\u003e: \u003cspan\u003eICE\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMake\u003c\/strong\u003e: \u003cspan\u003eChevrolet\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine\u003c\/strong\u003e: \u003cspan\u003eLS3\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Manley","offers":[{"title":"Default Title","offer_id":50249036955926,"sku":"BBPB-12354H-8","price":694.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/0878\/9782\/files\/1234558071174264e9f4b44e854df8cc.jpg?v=1758858872","url":"https:\/\/www.cspracing.com\/products\/manley-12354h-8-valve-intake-valve-l-92-p-f-2-165-300-hollow","provider":"Complete Street Performance","version":"1.0","type":"link"}