{"product_id":"manley-chevy-l-99-severe-duty-series-2-165in-head-diameter-intake-valve-single","title":"Manley Chevy L-99 Severe Duty Series 2.165in Head Diameter Intake Valve (Single)","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":54196457734303,"sku":"MAN12354H-1","price":86.77,"currency_code":"USD","in_stock":true}],"url":"https:\/\/streetdrivenperformance.net\/products\/manley-chevy-l-99-severe-duty-series-2-165in-head-diameter-intake-valve-single","provider":"Street Driven Performance","version":"1.0","type":"link"}