{"product_id":"manley-ford-351c-1-710-inch-head-diameter-3415-inch-stem-diameter-stock-height-set-of-8","title":"Manley Performance 1.710 Inch Head Diameter \/ .3415 Inch Stem \/ Diameter Stock Height (Set of 8) fits Ford 351C","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":44491839930575,"sku":"MAN11805-8","price":301.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/4164\/7055\/files\/Manley-Ford-351C-1710-Inch-Head-Diameter-3415-Inch-1758659346.webp?v=1758659347","url":"https:\/\/www.cimotorsports.com\/products\/manley-ford-351c-1-710-inch-head-diameter-3415-inch-stem-diameter-stock-height-set-of-8","provider":"CI Motorsports","version":"1.0","type":"link"}