{"product_id":"manley-big-block-chevy-2-350in-diameter-0-350in-longer-length-extreme-duty-exhaust-valves-single","title":"Manley Big Block Chevy 2.350in Diameter 0.350in Longer Length Extreme Duty Exhaust Valves - Single","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":42675314393193,"sku":"MAN11880-1","price":38.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/3949\/6041\/files\/53486a838b36cd9095e68ae770cd2598_2c04cffe-3b46-4fd9-8d83-accc48f5a595.jpg?v=1762862556","url":"https:\/\/velocityfactor.shop\/products\/manley-big-block-chevy-2-350in-diameter-0-350in-longer-length-extreme-duty-exhaust-valves-single","provider":"Velocity Factor","version":"1.0","type":"link"}