{"product_id":"manley-chevrolet-big-block-exhaust-valve-kit-1-900in-head-dia-5-422in-o-a-length-0-3415in-stem-2","title":"Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O\/A Length, 0.3415in Stem","description":"Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":53205292843292,"sku":"MAN11883-8","price":179.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/7614\/9689\/files\/60a800d0c1f947d0f60d7b7f5af0f3caL_8ef87349-dba4-496d-aa00-c2baddd1275a.jpg?v=1761051632","url":"https:\/\/www.demonicperformance.com\/products\/manley-chevrolet-big-block-exhaust-valve-kit-1-900in-head-dia-5-422in-o-a-length-0-3415in-stem-2","provider":"Demonic Performance ","version":"1.0","type":"link"}