{"product_id":"manley-ford-429-boss-exhaust-valve-kit-1-900in-head-dia-5-650in-o-a-length-0-3715in-stem","title":"Manley Ford 429 Boss Exhaust Valve Kit - 1.900in Head Dia. 5.650in O\/A Length, 0.3715in 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":53333783740700,"sku":"MAN11787-8","price":179.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/7614\/9689\/files\/1ecc177028ebb28898eba0253019ba05L_e99cef56-39c9-45fa-8bae-f6f4642be0ba.jpg?v=1763096589","url":"https:\/\/www.demonicperformance.com\/products\/manley-ford-429-boss-exhaust-valve-kit-1-900in-head-dia-5-650in-o-a-length-0-3715in-stem","provider":"Demonic Performance ","version":"1.0","type":"link"}