{"product_id":"motorshop-panhead-cylinder-heads-3-5-8-inch-big-bore-for-harley-davidson-fl-models","title":"Motorshop Panhead Cylinder Heads 3 5 8 Big Bore Harley FL","description":"\u003cdiv\u003e\n\u003ch1\u003eMotorshop Panhead Cylinder Heads for Harley FL (1963–1965) — 3-5\/8\" Big Bore Shovelhead Compatibility\u003c\/h1\u003e\n\u003cp\u003eMotorshop Panhead Cylinder Heads for Harley-Davidson FL models from 1963 to 1965 arrive ready to install as a single-plug Panhead assembly. Built for durability, they feature cast iron guides and nitrated valves to withstand wear and deliver reliable performance. The heads come with stock-style springs and retainers to maintain compatibility with original components while ensuring dependable operation.\u003c\/p\u003e\n\u003cp\u003eDesigned for Shovelhead-compatible setups, they include a Shovelhead exhaust pipe flange and intake ports that accept Shovelhead o-ring type manifolds, providing flexible options for custom builds. The Panhead variant includes an external oiler optimized for Big Bore applications with cams up to.450 lift, helping lubrication in high-performance builds.\u003c\/p\u003e\n\u003cp\u003eThey are engineered to fit 3-5\/8 inch Big Bore Shovelhead cylinders with a 98.6mm flange, ensuring precise compatibility. The top oiler holes use 1\/8 inch National Pipe Thread, and pipe plugs are installed with the same threading for secure sealing. Rocker arm assembly and studs are sold separately, and outside oiling may be required depending on your setup.\u003c\/p\u003e\n\u003cp\u003eOriginating in Taiwan, these cylinder heads aim to deliver dependable quality and compatibility whether restoring a vintage Harley or pursuing increased performance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeads assembled with cast iron guides for durability\u003c\/li\u003e\n\u003cli\u003eValve stem seals provide reliable sealing\u003c\/li\u003e\n\u003cli\u003eNitrated valves for enhanced wear resistance\u003c\/li\u003e\n\u003cli\u003eShovelhead intake ports accept o-ring type manifolds\u003c\/li\u003e\n\u003cli\u003ePanhead features external oiler suitable for Big Bore applications up to.450 lift cam\u003c\/li\u003e\n\u003cli\u003eStock style springs and retainers for compatibility\u003c\/li\u003e\n\u003cli\u003eIncludes Shovelhead exhaust pipe flange for easy installation\u003c\/li\u003e\n\u003cli\u003eTop oiler holes with 1\/8 inch National Pipe Thread\u003c\/li\u003e\n\u003cli\u003ePipe plugs with 1\/8 inch National Pipe Thread for secure sealing\u003c\/li\u003e\n\u003cli\u003eRequires 3-5\/8 inch Big Bore Shovelhead cylinders with 98.6mm flange\u003c\/li\u003e\n\u003cli\u003eFitment: Harley Davidson FL 1963, 1964, 1965\u003c\/li\u003e\n\u003cli\u003eRocker arm assembly and studs sold separately; outside oiling may be required depending on setup\u003c\/li\u003e\n\u003c\/ul\u003eV-Twin Motor Shop Ready single plug type Panheads are assembled and are ready to install.\n\u003cp\u003eDesigned specifically for Harley Davidson FL models from 1963 to 1965, the Motorshop Panhead Cylinder Heads feature robust construction with cast iron guides and nitrated valves for enhanced durability and performance. These heads are assembled with stock-style springs and retainers, ensuring compatibility with original components while providing reliable operation. The heads incorporate a Shovelhead exhaust pipe flange and intake ports that accept Shovelhead o-ring type manifolds, offering versatility for custom setups and performance upgrades. The Panhead variant includes an external oiler optimized for Big Bore applications with up to.450 lift cams, facilitating improved lubrication and performance in high-performance builds. These heads are designed to fit 3-5\/8 inch Big Bore Shovelhead cylinders with a 98.6mm flange, ensuring precise compatibility. The top oiler holes feature a 1\/8 inch National Pipe Thread, and pipe plugs are installed with the same threading for secure sealing. It’s important to note that the rocker arm assembly and studs are sold separately, and outside oiling may be required depending on your specific setup. These cylinder heads originate from Taiwan, ensuring quality manufacturing standards. Whether you're restoring a vintage Harley or upgrading for increased performance, the Motorshop Panhead Cylinder Heads deliver dependable quality and compatibility for your project.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eHeads assembled with cast iron guides for durability\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eValve stem seals provide reliable sealing\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eNitrated valves for enhanced wear resistance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eShovelhead intake ports accept o-ring type manifolds\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003ePanhead features external oiler suitable for Big Bore applications up to.450 lift cam\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eStock style springs and retainers for compatibility\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eIncludes Shovelhead exhaust pipe flange for easy installation\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eTop oiler holes with 1\/8 inch National Pipe Thread for custom lubrication setups\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003ePipe plugs with 1\/8 inch National Pipe Thread for secure sealing\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eRequires 3-5\/8 inch Big Bore Shovelhead cylinders with 98.6mm flange\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FL 1963\u003cbr\u003e\nHarley Davidson FL 1964\u003cbr\u003e\nHarley Davidson FL 1965\u003c\/div\u003e","brand":"Motorshop","offers":[{"title":"Default Title","offer_id":44649748627498,"sku":"10-1139","price":1233.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/10-1139a.jpg?v=1785781884","url":"https:\/\/atticusgoods.com\/products\/motorshop-panhead-cylinder-heads-3-5-8-inch-big-bore-for-harley-davidson-fl-models","provider":"Atticus Goods","version":"1.0","type":"link"}