{"product_id":"ford-flathead-aluminum-cylinder-head","title":"Ford Flathead Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Ford Flathead with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring performance-focused port, chamber, and valve specifications, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD FLATHEAD V8 ENGINES\u003cbr\u003e• 3.6L \/ 221 in³\u003cbr\u003e• 3.9L \/ 239 in³\u003cbr\u003e• 4.2L \/ 255 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord passenger cars (1939–1948 Flathead V8 equipped)\u003cbr\u003eFord trucks using compatible Flathead V8 engines\u003cbr\u003eHot rod and vintage Ford Flathead builds\u003cbr\u003eOffenhauser-style Flathead cylinder head applications (where listed)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVerify year range, head style, gasket selection, and cooling passage compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford Small Block Windsor, FE, Coyote, or Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eAssembled: No\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eQuantity: Sold Individually\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407043368,"sku":"JM4325","price":488.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4325_02.jpg?v=1760655562","url":"https:\/\/www.topstreetperformance.com\/products\/ford-flathead-aluminum-cylinder-head","provider":"Top Street Performance","version":"1.0","type":"link"}