{"product_id":"manley-valve-exhaust-valve-s-d-1-720","title":"Manley Valve - Exhaust, Valve-S\/D 1.720","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","offers":[{"title":"Default Title","offer_id":53198913274150,"sku":"BBPB_11553-8","price":301.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/5697\/5654\/files\/public_259e4e92-22af-4809-8c0a-4030c22c7637.jpg?v=1778729838","url":"https:\/\/ossparts.com\/products\/manley-valve-exhaust-valve-s-d-1-720","provider":"Operational Speed Supply","version":"1.0","type":"link"}