{"product_id":"manley-ford-351c-1-710-inch-head-diameter-3415-inch-stem-diameter-stock-height-set-of-8","title":"Manley Ford 351C 1.710 Inch Head Diameter \/ .3415 Inch Stem \/ Diameter Stock Height ( Set of 8)","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":51625277980968,"sku":"MAN11805-8","price":301.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/0218\/1416\/files\/cb287168807169beb5cec74c14444d7dL.jpg?v=1775418201","url":"https:\/\/shop.paradigm-automotive.com\/products\/manley-ford-351c-1-710-inch-head-diameter-3415-inch-stem-diameter-stock-height-set-of-8","provider":"Paradigm Automotive \u0026 Performance Shop","version":"1.0","type":"link"}