{"product_id":"manley-severe-duty-series-bbc-stainless-steel-exhaust-valves-1-880in-dia-5-422in-l-set-of-8","title":"Manley Severe Duty Series BBC Stainless Steel Exhaust Valves 1.880in Dia 5.422in L - Set of 8","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":52322164539697,"sku":"MAN11843-8","price":301.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1676\/3953\/files\/a3c03c0163593e8415296c2870f8c891_c3533c69-9b37-4890-82bb-7509fba1e42e.jpg?v=1767922201","url":"https:\/\/headgamesmotorworks.com\/products\/manley-severe-duty-series-bbc-stainless-steel-exhaust-valves-1-880in-dia-5-422in-l-set-of-8","provider":"Headgames Motorworks","version":"1.0","type":"link"}