{"product_id":"manley-severe-duty-series-chevy-big-block-intake-valve-2-300-in-head-dia-5-325-in-o-a-length","title":"Manley Severe Duty Series Chevy Big Block Intake Valve 2 300 In Head Dia 5 325 In O\/A Length","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":47381057274070,"sku":"MAN11530-1","price":44.54,"currency_code":"USD","in_stock":true}],"url":"https:\/\/warautoparts.com\/products\/manley-severe-duty-series-chevy-big-block-intake-valve-2-300-in-head-dia-5-325-in-o-a-length","provider":"War Auto Parts","version":"1.0","type":"link"}