{"product_id":"manley-ford-427intake-valve-kit-2-190in-head-dia-5-446in-o-a-length-0-3715in-stem","title":"Manley Ford 427intake Valve Kit - 2.190in Head Dia. 5.446in O\/A Length, 0.3715in Stem","description":"Manley 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.","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":47839834341602,"sku":"MAN11884-8","price":510.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/5004\/2082\/files\/5f59adb721bd97eaa904eecff3d033b0L_3e82f06b-90e9-4a1b-871b-d8107bdcd17a.jpg?v=1780097578","url":"https:\/\/raceclub.us\/products\/manley-ford-427intake-valve-kit-2-190in-head-dia-5-446in-o-a-length-0-3715in-stem","provider":"Race Club ","version":"1.0","type":"link"}