{"product_id":"head-diameter-2-080-in-stem-diameter-3133-in-o-a-4-874-hollow-stem-3","title":"Manley 11682H-8 Head Diameter: 2.080 in. - Stem Diameter: .3133 in. - O\/A : 4.874 - Hollow 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":51244621726011,"sku":"BBPB_11682H-8","price":1168.28,"currency_code":"CAD","in_stock":false}],"url":"https:\/\/performancepartscanada.ca\/products\/head-diameter-2-080-in-stem-diameter-3133-in-o-a-4-874-hollow-stem-3","provider":"Performance Parts Canada","version":"1.0","type":"link"}