{"product_id":"manley-chevrolet-small-block-exhaust-valve-kit-1-625in-head-dia-4-936in-o-a-length-0-3415in-stem","title":"Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 4.936in O\/A Length, 0.3415in 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 Performance","offers":[{"title":"Default Title","offer_id":42417768267819,"sku":"MAN11585-8","price":317.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2065\/7695\/files\/71a7d21fe2bd56432946b3dfa742c46bL_db8b4e02-a6da-42d5-854c-ca944299b047.jpg?v=1761027978","url":"https:\/\/boosted-creations.com\/products\/manley-chevrolet-small-block-exhaust-valve-kit-1-625in-head-dia-4-936in-o-a-length-0-3415in-stem","provider":"Boosted Creations","version":"1.0","type":"link"}