{"product_id":"manley-chevy-ls-3-l-99-l-92-head-2-165in-head-diameter-pro-flo-intake-valves-set-of-8","title":"Manley Chevy LS-3 \/ L-99 (L-92 Head) 2.165in Head Diameter Pro Flo Intake Valves (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":42363710505156,"sku":"MAN12354-8","price":301.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0516\/2405\/0884\/products\/5f4b70fa0b8a870e0877005e4b8d1853_0fcad3a9-50e6-445a-841d-e440c1528765.jpg?v=1692089590","url":"https:\/\/www.evolvedtuning.com\/products\/manley-chevy-ls-3-l-99-l-92-head-2-165in-head-diameter-pro-flo-intake-valves-set-of-8","provider":"Evolved Tuning","version":"1.0","type":"link"}