{"product_id":"manley-chevy-big-block-100-longer-11-32in-stem-dia-extreme-duty-marine-intake-valves-set-of-8","title":"Manley Chevy Big Block .100 Longer 11\/32in Stem Dia Extreme Duty \u0026 Marine 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":54507191533914,"sku":"MAN11842-8","price":519.18,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0950\/7441\/9034\/files\/5f4b70fa0b8a870e0877005e4b8d1853_13a296c8-df14-4442-981b-88468c55efdd.jpg?v=1785956056","url":"https:\/\/mprtruckparts.nl\/en\/products\/manley-chevy-big-block-100-longer-11-32in-stem-dia-extreme-duty-marine-intake-valves-set-of-8","provider":"MPRTruckParts","version":"1.0","type":"link"}