{"title":"Cylinder Heads","description":null,"products":[{"product_id":"panhead-assembled-cylinder-head-set","title":"Panhead Assembled Cylinder Head Set","description":"\u003cp\u003eFully assembled Panhead style cylinder head set. Great to breathe life into a tired Panhead or to build a new custom Panhead engine. Comes with Panhead exhaust and larger Shovelhead intake valves for improved breathing. All valve guides are cast iron for best longevity; valves are nitrated and valve seals are used on all valves. Complete with springs and collars that allow a maximum valve lift of .425\". The aluminum casting are OEM style with stock O-ring type manifold intake and stock exhaust ports. Max lift is .425\". - Assembled heads - Cast iron valve guides - Nitrated valves - Valve seals on all guides - Maximum valve lift .425\" - Panhead intake valves - Shovel exhaust valves - 75-up Shovel long reach style spark plugs - Used with OEM style Panhead headers - For O-ring style manifold\u003c\/p\u003e","brand":"V Twin Mfg","offers":[{"title":"Default Title","offer_id":50010157744456,"sku":"995717","price":2429.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/995717.jpg?v=1779179446"},{"product_id":"aluminum-45-wldr-cylinder-head-set","title":"Aluminum 45\" Wldr Cylinder Head Set","description":"\u003cp\u003e1:6 High Compression. Will fit all WL models. To maximize performance heads should be combined with + 1\/8 large diameter intake valves (971199) and WLDR camshaft set (971250). Replaces OEM 16681-39; 16683-39; 9-39 and 10-39.\u003c\/p\u003e","brand":"Samwel Supplies","offers":[{"title":"Default Title","offer_id":50010371227976,"sku":"971198","price":611.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/971198.jpg?v=1779112365"},{"product_id":"aluminum-45-wl-cylinder-head-rear","title":"Aluminum 45\" Wl Cylinder Head. Rear","description":"\u003cp\u003eStandard 1:5 compression. Reproduction side valve aluminum cylinder heads for 45\" (750cc) WL models. Repl. 9-40 (16691-55).   Note: See 971172 for matching front cylinder head.\u003c\/p\u003e","brand":"Samwel Supplies","offers":[{"title":"Default Title","offer_id":50010379780424,"sku":"971173","price":349.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/971173.jpg?v=1779112219"},{"product_id":"aluminum-45-wl-cylinder-head-front","title":"Aluminum 45\" Wl Cylinder Head. Front","description":"\u003cp\u003eStandard 1:5 compression. Reproduction side valve aluminum cylinder heads for 45\" (750cc) WL models. Repl. 16693-55 and 9-40.   Note: See 971173 for matching rear cylinder head.\u003c\/p\u003e","brand":"Samwel Supplies","offers":[{"title":"Default Title","offer_id":50010400358728,"sku":"971172","price":325.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/971172.jpg?v=1779112206"},{"product_id":"super-stock-heads-89-cc-black","title":"S\u0026S Cycle Super Stock Heads 89 Cc Black","description":"\u003cp\u003e89 cc Super Stock® Cylinder Heads\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003eDesigned for '99-'05 engines with stock crankcase\u003c\/li\u003e\u003cli\u003eGood for touring bikes and other heavy vehicles\u003c\/li\u003e\u003cli\u003eWorks best for motors over 103\" or with high-compression pop-up pistons\u003c\/li\u003e\u003cli\u003eCombustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines\u003c\/li\u003e\u003cli\u003eLarge 2.000\" intake and 1.605\" exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to .650\" lift\u003c\/li\u003e\u003cli\u003eIntake ports flow 264 CFM (Cubic Feet per Minute) compared to stock heads at 182 CFM\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds\u003c\/li\u003e\u003cli\u003eIncludes heads and four long headbolts; and reuse four long OEM headbolts\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression releases are used.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029769490760,"sku":"09300006","price":1978.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300006_1.jpg?v=1778066397"},{"product_id":"super-stock-heads-76-5-cc-black","title":"S\u0026S Cycle Super Stock Heads 76.5 Cc Black","description":"\u003cp\u003eSuper Stock™ Cylinder Head Kit\u003c\/p\u003e\u003cli\u003eS\u0026amp;S heads give great performance, and work with additional upgrades\u003c\/li\u003e\u003cli\u003eCompatible with stock 3-1\/2\" or 3-5\/8\" bore engines\u003c\/li\u003e\u003cli\u003eFully assembled, and include stainless steel valves and high-lift springs (up to .640 lift)\u003c\/li\u003e\u003cli\u003eLarge 2.000\" intake and 1.605\" exhaust valves and high flowing ports supply plenty of air for big inch engines\u003c\/li\u003e\u003cli\u003eMust reuse stock headbolts\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eS\u0026amp;S Super Stock piston kits are required.\u003c\/li\u003e\u003cli\u003eIntake manifold, pistons and gasket kits are sold separately.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029747044680,"sku":"09300008","price":1982.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300008_1.jpg?v=1778066408"},{"product_id":"super-stock-heads-stock-bore-silver","title":"S\u0026S Cycle Super Stock Heads Stock Bore Silver","description":"\u003cp\u003eSuper Stock® Cylinder Head Kit\u003c\/p\u003e\u003cli\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers\u003c\/li\u003e\u003cli\u003eKit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions\u003c\/li\u003e\u003cli\u003eFeatures stock appearance, but flow better than stock heads\u003c\/li\u003e\u003cli\u003eUse OEM manifolds and exhaust\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003eMachined for one spark plug per head and accepts stock bore 74\" or 80\" cylinders.\u003cbr\u003eCylinder heads are original equipment on S\u0026amp;S® SH-Series engines, and are an upgrade for stock shovelheads.\u003cbr\u003eRocker boxes are fastened with 5\/16\"-18 cap screws instead of stock studs and nuts.\u003cbr\u003eKit Includes:\u003cbr\u003e• Front and Rear Cylinder Head Assemblies\u003cbr\u003e• Rocker Box Gaskets\u003cbr\u003e• Copper Head Gaskets\u003cbr\u003e• Exhaust Gaskets\u003cbr\u003e• Hardware\u003cbr\u003e• Instructions","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029731283272,"sku":"09300009","price":2182.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300009_1.jpg?v=1778066419"},{"product_id":"super-stock-heads-3-625-bore-dual-plug-silver","title":"S\u0026S Cycle Super Stock Heads 3.625\" Bore Dual Plug Silver","description":"\u003cp\u003eSuper Stock® Cylinder Head Kit\u003c\/p\u003e\u003cli\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers\u003c\/li\u003e\u003cli\u003eKit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions\u003c\/li\u003e\u003cli\u003eFeatures stock appearance, but flow better than stock heads\u003c\/li\u003e\u003cli\u003eUse OEM manifolds and exhaust\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003eHigh compression heads.\u003cbr\u003eMachined for dual plugs and internal oil drains.","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029778043208,"sku":"09300013","price":2400.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300013_1.jpg?v=1778066430"},{"product_id":"super-stock-heads-stock-bore-silver-1","title":"S\u0026S Cycle Super Stock Heads Stock Bore Silver","description":"\u003cp\u003eSuper Stock® Cylinder Head Kit\u003c\/p\u003e\u003cli\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers\u003c\/li\u003e\u003cli\u003eKit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions\u003c\/li\u003e\u003cli\u003eFeatures stock appearance, but flow better than stock heads\u003c\/li\u003e\u003cli\u003eUse OEM manifolds and exhaust\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029788627272,"sku":"09300015","price":1898.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/512371.jpg?v=1778653036"},{"product_id":"super-stock-heads-3-625-bore-silver","title":"S\u0026S Cycle Super Stock Heads 3.625\" Bore Silver","description":"\u003cp\u003eSuper Stock® Cylinder Head Kit\u003c\/p\u003e\u003cli\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers\u003c\/li\u003e\u003cli\u003eKit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions\u003c\/li\u003e\u003cli\u003eFeatures stock appearance, but flow better than stock heads\u003c\/li\u003e\u003cli\u003eUse OEM manifolds and exhaust\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003eMachined for one spark plug per head and accepts 3-5\/8\" bore cylinders.\u003cbr\u003eCylinder heads are original equipment on S\u0026amp;S® SH-Series engines, and are a great upgrade for stock shovelheads.\u003cbr\u003eRocker boxes are fastened with 5\/16\"-18 cap screws instead of the stock studs and nuts.\u003cbr\u003eKit Includes:\u003cbr\u003e• Front and Rear Cylinder Head Assemblies\u003cbr\u003e• Rocker Box Gaskets\u003cbr\u003e• Copper Head Gaskets\u003cbr\u003e• Exhaust Gaskets\u003cbr\u003e• Hardware\u003cbr\u003e• Instructions","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029769720136,"sku":"09300017","price":2092.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300017_1.jpg?v=1778066451"},{"product_id":"super-stock-heads-79-cc-black","title":"S\u0026S Cycle Super Stock Heads 79 Cc Black","description":"\u003cp\u003e79 cc Super Stock® Cylinder Head\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003eWorks great with 88\" to 103\" stock  motors, but are ideal for larger stroker or big bore engines up to 110\"\u003c\/li\u003e\u003cli\u003eLarge 1.940\" intake and 1.575\" exhaust valve maintain port velocity for good low and midrange response, but supply enough air for stock and slightly larger engines to perform to their full potential\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to .650\" lift (unless noted)\u003c\/li\u003e\u003cli\u003eHeads can be decked up to 0.060\" to increase compression\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds (unless noted)\u003c\/li\u003e\u003cli\u003eHeads are machined for compression releases (sold separately)\u003c\/li\u003e\u003cli\u003eHigh port flow gives great performance now, and more later when additional upgrades are done\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eIf cams with higher TDC lifts are used or if heads are decked, piston valve pockets will require re-machining.\u003c\/li\u003e\u003cli\u003eDoes not include rocker arm components, intake manifold or gaskets.\u003c\/li\u003e\u003cli\u003eShould not be used with any piston having a pop up dome.\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression releases are used.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029788791112,"sku":"09300058","price":2298.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/531830.jpg?v=1778696919"},{"product_id":"replacement-cylinder-heads-low-compression-82-cc-silver","title":"S\u0026S Cycle Replacement Cylinder Heads Low Compression 82 Cc Silver","description":"\u003cp\u003ePerformance Replacement Head\u003c\/p\u003e\u003cli\u003eFully assembled, and include stainless steel valves and high-lift springs\u003c\/li\u003e\u003cli\u003eOptimized for smaller displacement engines\u003c\/li\u003e\u003cli\u003eAvailable to be used with stock-style flat-top pistons\u003c\/li\u003e\u003cli\u003ePort design increases flow, while maintaining velocity\u003c\/li\u003e\u003cli\u003eSet up for .585\" maximum lift\u003c\/li\u003e\u003cli\u003eEFI compatible\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eIntake manifold and gasket kits are sold separately.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029769916744,"sku":"09300060","price":1974.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/512522.jpg?v=1778653631"},{"product_id":"replacement-cylinder-heads-low-compression-82-cc-black","title":"S\u0026S Cycle Replacement Cylinder Heads Low Compression 82 Cc Black","description":"\u003cp\u003ePerformance Replacement Head\u003c\/p\u003e\u003cli\u003eFully assembled, and include stainless steel valves and high-lift springs\u003c\/li\u003e\u003cli\u003eOptimized for smaller displacement engines\u003c\/li\u003e\u003cli\u003eAvailable to be used with stock-style flat-top pistons\u003c\/li\u003e\u003cli\u003ePort design increases flow, while maintaining velocity\u003c\/li\u003e\u003cli\u003eSet up for .585\" maximum lift\u003c\/li\u003e\u003cli\u003eEFI compatible\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eIntake manifold and gasket kits are sold separately.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029747405128,"sku":"09300061","price":1718.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/512523.jpg?v=1778653642"},{"product_id":"super-stock-heads-79-cc-silver","title":"S\u0026S Cycle Super Stock Heads 79 Cc Silver","description":"\u003cp\u003e79 cc Super Stock® Cylinder Head\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003eWorks great with 88\" to 103\" stock  motors, but are ideal for larger stroker or big bore engines up to 110\"\u003c\/li\u003e\u003cli\u003eLarge 1.940\" intake and 1.575\" exhaust valve maintain port velocity for good low and midrange response, but supply enough air for stock and slightly larger engines to perform to their full potential\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to .650\" lift (unless noted)\u003c\/li\u003e\u003cli\u003eHeads can be decked up to 0.060\" to increase compression\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds (unless noted)\u003c\/li\u003e\u003cli\u003eHeads are machined for compression releases (sold separately)\u003c\/li\u003e\u003cli\u003eHigh port flow gives great performance now, and more later when additional upgrades are done\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eIf cams with higher TDC lifts are used or if heads are decked, piston valve pockets will require re-machining.\u003c\/li\u003e\u003cli\u003eDoes not include rocker arm components, intake manifold or gaskets.\u003c\/li\u003e\u003cli\u003eShould not be used with any piston having a pop up dome.\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression releases are used.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029731578184,"sku":"09300062","price":2721.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300062_1.jpg?v=1778066528"},{"product_id":"super-stock-heads-79-cc-silver-1","title":"S\u0026S Cycle Super Stock Heads 79 Cc Silver","description":"\u003cp\u003e79 cc Super Stock® Cylinder Heads\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003eDesigned for stock 88\" to 103\" engines or slightly modified engines up to 110\"\u003c\/li\u003e\u003cli\u003eModerately sized 1.940\" intake and 1.575\" exhaust valves maintain port velocity in smaller displacement engines for good low and midrange response\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to .650\" lift\u003c\/li\u003e\u003cli\u003eCombustion chamber provides a significantly higher than stock, but still manageable compression ratio\u003c\/li\u003e\u003cli\u003eHeads can be decked up to .060\" to increase compression, but will require piston valve pockets to be re-machined\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds\u003c\/li\u003e\u003cli\u003eMachined for S\u0026amp;S® electric or manual compression releases\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eShould not be used with any piston having a pop up dome.\u003c\/li\u003e\u003cli\u003eNot compatible with '14-'16 FLHTK\/FLHTKL, FLHTCUTG Twin-Cooled motors or '17 touring models.\u003c\/li\u003e\u003cli\u003eMust use the included S\u0026amp;S valve cover gasket kit with stock rocker covers.\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression releases are used.\u003c\/li\u003eNot for late model twin cam Harley Davidson® ACR's (Atomatic Compression Release) already installed.","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029778239816,"sku":"09300063","price":2526.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300063_1.jpg?v=1778066539"},{"product_id":"super-stock-heads-79-cc-black-1","title":"S\u0026S Cycle Super Stock Heads 79 Cc Black","description":"\u003cp\u003e79 cc Super Stock® Cylinder Heads\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003eDesigned for stock 88\" to 103\" engines or slightly modified engines up to 110\"\u003c\/li\u003e\u003cli\u003eModerately sized 1.940\" intake and 1.575\" exhaust valves maintain port velocity in smaller displacement engines for good low and midrange response\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to .650\" lift\u003c\/li\u003e\u003cli\u003eCombustion chamber provides a significantly higher than stock, but still manageable compression ratio\u003c\/li\u003e\u003cli\u003eHeads can be decked up to .060\" to increase compression, but will require piston valve pockets to be re-machined\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds\u003c\/li\u003e\u003cli\u003eMachined for S\u0026amp;S® electric or manual compression releases\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eShould not be used with any piston having a pop up dome.\u003c\/li\u003e\u003cli\u003eNot compatible with '14-'16 FLHTK\/FLHTKL, FLHTCUTG Twin-Cooled motors or '17 touring models.\u003c\/li\u003e\u003cli\u003eMust use the included S\u0026amp;S valve cover gasket kit with stock rocker covers.\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression releases are used.\u003c\/li\u003eNot for late model twin cam Harley Davidson® ACR's (Atomatic Compression Release) already installed.","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029788987720,"sku":"09300064","price":2526.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/531834.jpg?v=1778696931"},{"product_id":"super-stock-heads-89-cc-silver","title":"S\u0026S Cycle Super Stock Heads 89 Cc Silver","description":"\u003cp\u003e89 cc Super Stock® Cylinder Heads\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003e Designed for '06-'16 engines with stock crankcase\u003c\/li\u003e\u003cli\u003eGood for touring bikes and other heavy vehicles\u003c\/li\u003e\u003cli\u003eWorks well with engines of stock displacement, but are ideal for somewhat larger stroker or big bore engines up to 110\"\u003c\/li\u003e\u003cli\u003eCombustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines\u003c\/li\u003e\u003cli\u003eLarge 2.000\" intake and 1.605\" exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential\u003c\/li\u003e\u003cli\u003eS\u0026amp;S® High performance valve springs allow the installation of camshafts with up to 0.650\" lift\u003c\/li\u003e\u003cli\u003eIntake ports flow 264 CFM (Cubic Feet per Minute) compared to stock heads at 182 CFM\u003c\/li\u003e\u003cli\u003eCompatible with stock rocker boxes, exhaust, and intake manifolds\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003cli\u003eWill not work with S\u0026amp;S compression releases in a late model twin cam that has Harley Davidson® ACR (Automatic Compression Release) already installed.\u003c\/li\u003e\u003cli\u003eNot compatible with '14-'16 FLHTK\/FLHTKL, FLHTCUTG Twin-Cooled motors or '17 touring models.\u003c\/li\u003e\u003cli\u003eNot for models with OEM compression releases.\u003c\/li\u003e\u003cli\u003eMust use S\u0026amp;S rocker boxes if S\u0026amp;S compression realses are used.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50029770113352,"sku":"09300065","price":2526.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/09300065_1.jpg?v=1778066560"},{"product_id":"super-stock-heads-89-cc-black-1","title":"S\u0026S Cycle Super Stock Heads 89 Cc Black","description":"\u003cp\u003e89 cc Super Stock® Cylinder Heads\u003c\/p\u003e\u003cli\u003eHeads are fully assembled with springs and valves\u003c\/li\u003e\u003cli\u003e Designed for '06-'16 engines with stock crankcase\u003c\/li\u003e\u003cli\u003eGood for touring bikes and other heavy vehicles\u003c\/li\u003e\u003cli\u003eWorks well with engines of stock displacement, but are ideal for somewhat larger stroker or big bore engines up to 110\"\u003c\/li\u003e\u003cli\u003eCombustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock 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M10 1.050","description":"\u003cp\u003eCompression Release Valve\u003c\/p\u003e\u003cli\u003eState-of-the-art design to help reduce hot start issues and starter\/​battery loads\u003c\/li\u003e\u003cli\u003eHave 5-7 Newtons of closing force resistance\u003c\/li\u003e\u003cli\u003eCustom molded knobs ensure they stay cool to the touch and are easy to operate\u003c\/li\u003e\u003cli\u003eRequire an M10 x 1.00 threaded hole for installation\u003c\/li\u003e\u003cli\u003eSold in pairs\u003c\/li\u003e\u003cli\u003eMade in the U.S.A.\u003c\/li\u003e","brand":"Kibblewhite","offers":[{"title":"Default Title","offer_id":52457231352136,"sku":"09500887","price":46.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/569219.jpg?v=1778754484"},{"product_id":"s-s-cycle-elect-comp-releases","title":"S\u0026S Cycle Elect.Comp.Releases","description":"\u003cp\u003eCompression Release Kit\u003c\/p\u003e\u003cli\u003eElectric compression releases open when you press the start button and close when the button is released\u003c\/li\u003e\u003cli\u003eManual compression releases are opened manually and close when the motor starts\u003c\/li\u003e\u003cli\u003eKits include the required parts for installation\u003c\/li\u003e\u003cli\u003eFor ease of installation and removal, a special socket can be purchased separately\u003c\/li\u003e\u003cli\u003eNot for use on OEM heads\u003c\/li\u003e\u003cli\u003eMade in the U.S.A.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":52483411837256,"sku":"20099080","price":492.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/915195.jpg?v=1778984691"},{"product_id":"s-s-cycle-comp-release-hole-plug","title":"S\u0026S Cycle Comp.Release Hole Plug","description":"\u003cp\u003eCompression Release Hole Plug\u003c\/p\u003e\u003cli\u003eNot for use on OEM heads\u003c\/li\u003e\u003cli\u003eMade in the U.S.A.\u003c\/li\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":52483412001096,"sku":"20099082","price":28.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/915209.jpg?v=1778984716"},{"product_id":"colony-headbolts-big-twin-xl","title":"Colony Headbolts Big Twin\/Xl","description":"\u003cp\u003eHead Bolt Set\u003c\/p\u003e\u003cli\u003eReplacement head bolts\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e","brand":"Colony","offers":[{"title":"Default Title","offer_id":52508786655560,"sku":"24010955","price":90.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/24010955_1.jpg?v=1778247696"},{"product_id":"colony-headbolts-bt-tc-xl","title":"Colony Headbolts Bt\/Tc Xl","description":"\u003cp\u003eHead Bolt Set\u003c\/p\u003e\u003cli\u003eReplacement head bolts\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e","brand":"Colony","offers":[{"title":"Default Title","offer_id":52508786819400,"sku":"24010956","price":90.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/24010956_1.jpg?v=1778247707"},{"product_id":"jims-comp-release-valves","title":"Jims Comp. Release Valves","description":"\u003cp\u003eManual Compression Release Valves\u003c\/p\u003e\u003cli\u003eSimply drill and tap (10 mm x 1.0 mm) each cylinder head and thread in the self-sealing release valves\u003c\/li\u003e\u003cli\u003eGive your starter a hand by installing these in your high-compression, big-inch motor\u003c\/li\u003e\u003cli\u003eFits all Big Twin models\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e","brand":"Jims","offers":[{"title":"Default Title","offer_id":52543214321992,"sku":"DS196400","price":165.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/978426.jpg?v=1779129311"},{"product_id":"s-s-superstock-evo-cyl-head-kit-black","title":"S\u0026S, SuperStock Evo cyl. head kit. Black","description":"\u003cp\u003eBlack powder coated finish. Bolt-on with stock style flat top pistons. 76cc high compression heads for approx. 10:1 CR (80\"); 9.4:1 (89\"); 10:1 (96\") compression ratios. The port design allows these heads to outflow stock heads by a wide margin. This set-up can be used with up to .585\" lift with TDC lifts of .252\" intake and .210\" exhaust. All heads can be decked .060\" to increase compression but extra care must be taken when assembling decked heads to assure sufficient valve lift clearance. Compatible with fuel injection models and will take stock head temperature sensor. Heads come complete with valves; guides and valve springs installed.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53081170575688,"sku":"531906","price":1790.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/531906.jpg?v=1778697278"},{"product_id":"s-s-superstock-evo-cyl-head-kit-natural","title":"S\u0026S, SuperStock Evo cyl. head kit. Natural","description":"\u003cp\u003eNatural finish. Bolt-on with stock style flat top pistons. 76cc high compression heads for approx. 10:1 CR (80\"); 9.4:1 (89\"); 10:1 (96\") compression ratios. The port design allows these heads to outflow stock heads by a wide margin. This set-up can be used with up to .585\" lift with TDC lifts of .252\" intake and .210\" exhaust. All heads can be decked .060\" to increase compression but extra care must be taken when assembling decked heads to assure sufficient valve lift clearance. Compatible with fuel injection models and will take stock head temperature sensor. Heads come complete with valves; guides and valve springs installed.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53081171362120,"sku":"531905","price":1711.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/531905.jpg?v=1778697267"},{"product_id":"s-s-superstock-evo-cyl-head-kit-polished","title":"S\u0026S, SuperStock Evo cyl. head kit. Polished","description":"\u003cp\u003ePolished finish. Bolt-on with stock style flat top pistons. 82cc low compression heads for approx. 8.4:1 (80\"); 8.9:1 (89\"); 9.5:1 (96\") compression ratios. The port design allows these heads to outflow stock heads by a wide margin. This set-up can be used with up to .585\" lift with TDC lifts of .252\" intake and .210\" exhaust. All heads can be decked .060\" to increase compression but extra care must be taken when assembling decked heads to assure sufficient valve lift clearance. Compatible with fuel injection models and will take stock head temperature sensor. Heads come complete with valves; guides and valve springs installed.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53081172083016,"sku":"531904","price":2191.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/531904.jpg?v=1778697255"},{"product_id":"panhead-cylinder-head-set-fl48-54","title":"Panhead Cylinder Head Set Fl48 54","description":"\u003cp\u003eOriginal contour castings Panhead cylinder heads with the added detail of the stock intake and exhaust port areas. They are assembled with cast iron guides, valve stem seals, nitrated Panhead exhaust and nitrated Shovelhead intake valves in combination with a complete spring and collar set. Heads must be used with 1948-1954 style intake manifold. Order rocker arm assemblies, studs and replica head bolt set separately.\u003c\/p\u003e","brand":"V Twin Mfg","offers":[{"title":"Default Title","offer_id":53098928767304,"sku":"735084","price":2624.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2711\/4344\/files\/standard-rgba_173dc502-3896-4916-861e-9b8a52262c1e.png?v=1782864341"}],"url":"https:\/\/holydeath.com\/collections\/cylinder-heads.oembed","provider":"Holy Death Motorcycle Co.","version":"1.0","type":"link"}