{"product_id":"manley-valve-exhaust-valve-s-d-l83-5-3l-1-560-3136-stem","title":"Manley 12361-8 Valve - Exhaust, Valve-S\/D L83 5.3L 1.560, .3136 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","offers":[{"title":"Default Title","offer_id":51144525021499,"sku":"BBPB_12361-8","price":511.76,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/5958\/2011\/files\/public_ec2511e9-bb89-4f0e-b115-06c78874fd1a.jpg?v=1775984132","url":"https:\/\/performancepartscanada.ca\/products\/manley-valve-exhaust-valve-s-d-l83-5-3l-1-560-3136-stem","provider":"Performance Parts Canada","version":"1.0","type":"link"}