{"title":"heads \u0026 parts","description":null,"products":[{"product_id":"cylinder-head","title":"Cylinder Head","description":"Billet aluminum construction. Dramatically increased combustion efficiency. Radical combustion chamber design provides more horsepower with less chance of detonation. For low altitude operation with stock or modified engines.","brand":"Starting Line Products","offers":[{"title":"Default Title","offer_id":52558313357621,"sku":"FJLJ_12-850","price":471.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300179_0.png?v=1775911640"},{"product_id":"block-off-plate-black","title":"Block Off Plate - Black","description":"CNC-machined aluminum block-off plates allow removal of excess equipment weight. Safely block and seal off air injection ports. Enable accurate air-to-fuel ratio measurement on the dyno. 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For closed-course use only..","brand":"PSR","offers":[{"title":"Default Title","offer_id":52570266468661,"sku":"KMRG_04-01351-22","price":39.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300098_0.png?v=1776196654"},{"product_id":"block-off-plate-black-4","title":"Block Off Plate - Black","description":"CNC-machined aluminum block-off plates allow removal of excess equipment weight. Safely block and seal off air injection ports. Enable accurate air-to-fuel ratio measurement on the dyno. 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For closed-course use only..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"PSR","offers":[{"title":"Default Title","offer_id":53082624721205,"sku":"KMRG_00-01351-22","price":39.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300079_0.png?v=1783020927"},{"product_id":"kibblewhite-precision-exhaust-spigot-big-twin-20-2104","title":"Kibblewhite Precision Exhaust Spigot - Big Twin  -  20-2104","description":"Kibblewhite Precision Exhaust Spigot - Big Twin  -  20-2104\u003cp\u003e\u003cbr\u003eDesigned and machined from 6061 T-6 aluminum extruded tubing. Allows you to rebuild the exhaust attachment point on your classic Panhead engine. Welding required. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Kibblewhite Precision","offers":[{"title":"Default Title","offer_id":53102695055669,"sku":"FHRX_20-2104","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300059_0.png?v=1783432141"},{"product_id":"s-s-cycle-retro-top-end-conversion-kit-106-1071","title":"S\u0026S Cycle Retro Top End Conversion Kit  -  106-1071","description":"S\u0026amp;S Cycle Retro Top End Conversion Kit  -  106-1071\u003cp\u003e\u003cbr\u003eGive your Shovelhead engine that nostalgic look of a Panhead. Kit consists of a set of S\u0026amp;S P-series cylinder heads with rocker cradles, S\u0026amp;S roller rocker arms, S\u0026amp;S hydraulic tappets, billet tappet guides, Quickee pushrods, pushrod cover clips and all required gaskets and hardware for assembly. Heads have a Shovelhead bolt pattern, making them compatible with any stock or aftermarket cylinders for 66-84 Big Twins; heads come complete with valves and .590\" lift valve springs. Accept stock or S\u0026amp;S O-ring-style manifolds for Shovelheads and any exhaust system made to fit a shovelhead engine. Kits do not include pan covers..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134839611701,"sku":"FJHF_106-1071","price":3959.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300090_0.png?v=1784099621"},{"product_id":"s-s-cycle-cylinder-heads-twin-cam-106-3233","title":"S\u0026S Cycle Cylinder Heads - Twin Cam  -  106-3233","description":"S\u0026amp;S Cycle Cylinder Heads - Twin Cam  -  106-3233\u003cp\u003e\u003cbr\u003eHigh port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications. 79cc heads work great with stock motors for 88\" to 103\" motors; 89cc heads work best for motors over 103\" or with high-compression pop-up pistons. 79cc have 1.940\" intake and 1.575\" exhaust valve and springs for up to .640\" lift; 89cc have 2.000\" intake and 1.605\" exhaust and .640\" springs. Heads are machined for compression releases unless noted otherwise (sold separately); S\u0026amp;S rocker boxes required when using S\u0026amp;S compression releases. Do not include rocker arm components, intake manifold or gaskets. Heads include four long headbolts, and reuse four long OEM headbolts. Accept OEM intake manifolds. Made in the U.S.A.. Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used.. Not compatible with Twin Cooled heads..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134850490677,"sku":"FJHF_106-3233","price":1756.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300064_0.png?v=1784099685"},{"product_id":"s-s-cycle-cylinder-heads-twin-cam-106-3227","title":"S\u0026S Cycle Cylinder Heads - Twin Cam  -  106-3227","description":"S\u0026amp;S Cycle Cylinder Heads - Twin Cam  -  106-3227\u003cp\u003e\u003cbr\u003eHigh port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications. 79cc heads work great with stock motors for 88\" to 103\" motors; 89cc heads work best for motors over 103\" or with high-compression pop-up pistons. 79cc have 1.940\" intake and 1.575\" exhaust valve and springs for up to .640\" lift; 89cc have 2.000\" intake and 1.605\" exhaust and .640\" springs. Heads are machined for compression releases unless noted otherwise (sold separately); S\u0026amp;S rocker boxes required when using S\u0026amp;S compression releases. Do not include rocker arm components, intake manifold or gaskets. Heads include four long headbolts, and reuse four long OEM headbolts. Accept OEM intake manifolds. Made in the U.S.A.. Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used.. Not compatible with Twin Cooled heads..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134851375413,"sku":"FJHF_106-3227","price":1891.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300063_0.png?v=1784099692"},{"product_id":"s-s-cycle-cylinder-heads-twin-cam-106-3240","title":"S\u0026S Cycle Cylinder Heads - Twin Cam  -  106-3240","description":"S\u0026amp;S Cycle Cylinder Heads - Twin Cam  -  106-3240\u003cp\u003e\u003cbr\u003eHigh port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications. 79cc heads work great with stock motors for 88\" to 103\" motors; 89cc heads work best for motors over 103\" or with high-compression pop-up pistons. 79cc have 1.940\" intake and 1.575\" exhaust valve and springs for up to .640\" lift; 89cc have 2.000\" intake and 1.605\" exhaust and .640\" springs. Heads are machined for compression releases unless noted otherwise (sold separately); S\u0026amp;S rocker boxes required when using S\u0026amp;S compression releases. Do not include rocker arm components, intake manifold or gaskets. Heads include four long headbolts, and reuse four long OEM headbolts. Accept OEM intake manifolds. Made in the U.S.A.. Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used.. Not compatible with Twin Cooled heads..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134852292917,"sku":"FJHF_106-3240","price":1756.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300066_0.png?v=1784099700"},{"product_id":"s-s-cycle-cylinder-heads-106-4277","title":"S\u0026S Cycle Cylinder Heads  -  106-4277","description":"S\u0026amp;S Cycle Cylinder Heads  -  106-4277\u003cp\u003e\u003cbr\u003eHigh port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications. 79cc heads work great with stock motors for 88\" to 103\" motors; 89cc heads work best for motors over 103\" or with high-compression pop-up pistons. 79cc have 1.940\" intake and 1.575\" exhaust valve and springs for up to .640\" lift; 89cc have 2.000\" intake and 1.605\" exhaust and .640\" springs. Heads are machined for compression releases unless noted otherwise (sold separately); S\u0026amp;S rocker boxes required when using S\u0026amp;S compression releases. Do not include rocker arm components, intake manifold or gaskets. Heads include four long headbolts, and reuse four long OEM headbolts. Accept OEM intake manifolds. Made in the U.S.A.. Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used.. Not compatible with Twin Cooled heads..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134867890485,"sku":"FJHF_106-4277","price":1891.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300062_0.png?v=1784099789"},{"product_id":"s-s-cycle-performance-replacement-head-106-4570","title":"S\u0026S Cycle Performance Replacement Head  -  106-4570","description":"S\u0026amp;S Cycle Performance Replacement Head  -  106-4570\u003cp\u003e\u003cbr\u003eS\u0026amp;S heads are available to be used with stock-style flat-top pistons. Kits are fully assembled, and include stainless steel valves and high-lift (.585\") springs. Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker box styles). Optimized for smaller displacement engines. Slight increase in compression (8.8:1 in an 80\" motor) with 82cc chamber volume. Port design increases flow, while maintaining velocity. Set up for .585\" maximum lift. EFI compatible. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134878769461,"sku":"FJHF_106-4570","price":1372.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300061_0.png?v=1784099844"},{"product_id":"s-s-cycle-performance-replacement-head-106-6059","title":"S\u0026S Cycle Performance Replacement Head  -  106-6059","description":"S\u0026amp;S Cycle Performance Replacement Head  -  106-6059\u003cp\u003e\u003cbr\u003eS\u0026amp;S heads are available to be used with stock-style flat-top pistons. Kits are fully assembled, and include stainless steel valves and high-lift (.585\") springs. Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker box styles). Optimized for smaller displacement engines. Slight increase in compression (8.8:1 in an 80\" motor) with 82cc chamber volume. Port design increases flow, while maintaining velocity. Set up for .585\" maximum lift. EFI compatible. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134924874037,"sku":"FJHF_106-6059","price":1292.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300154_0.png?v=1784100140"},{"product_id":"s-s-cycle-performance-replacement-head-106-6064","title":"S\u0026S Cycle Performance Replacement Head  -  106-6064","description":"S\u0026amp;S Cycle Performance Replacement Head  -  106-6064\u003cp\u003e\u003cbr\u003eS\u0026amp;S heads are available to be used with stock-style flat-top pistons. Kits are fully assembled, and include stainless steel valves and high-lift (.585\") springs. Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker box styles). Optimized for smaller displacement engines. Slight increase in compression (8.8:1 in an 80\" motor) with 82cc chamber volume. Port design increases flow, while maintaining velocity. Set up for .585\" maximum lift. EFI compatible. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53134926610741,"sku":"FJHF_106-6064","price":1367.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300141_0.png?v=1784100148"},{"product_id":"s-s-cycle-exhaust-port-stud-50-0493","title":"S\u0026S Cycle Exhaust Port Stud  -  50-0493","description":"S\u0026amp;S Cycle Exhaust Port Stud  -  50-0493\u003cp\u003e\u003cbr\u003eFour required per engine, sold each. Zinc-plated. 5\/16\"-18, 5\/16\"-24 1.910\". Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53135871967541,"sku":"FJHF_50-0493","price":7.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300136_0.png?v=1784105424"},{"product_id":"s-s-cycle-replacement-silicone-solenoid-caps-50-1080","title":"S\u0026S Cycle Replacement Silicone Solenoid Caps  -  50-1080","description":"S\u0026amp;S Cycle Replacement Silicone Solenoid Caps  -  50-1080\u003cp\u003e\u003cbr\u003eReplacement silicone solenoid caps for S\u0026amp;S electronic and manual compression release kits. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53135874851125,"sku":"FJHF_50-1080","price":11.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300041_0.png?v=1784105432"},{"product_id":"s-s-cycle-replacement-silicone-solenoid-caps-55-1009","title":"S\u0026S Cycle Replacement Silicone Solenoid Caps  -  55-1009","description":"S\u0026amp;S Cycle Replacement Silicone Solenoid Caps  -  55-1009\u003cp\u003e\u003cbr\u003eReplacement silicone solenoid caps for S\u0026amp;S electronic and manual compression release kits. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53135994552629,"sku":"FJHF_55-1009","price":8.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300137_0.png?v=1784105800"},{"product_id":"s-s-cycle-cylinder-head-kit-big-twin-90-1004","title":"S\u0026S Cycle Cylinder Head Kit - Big Twin  -  90-1004","description":"S\u0026amp;S Cycle Cylinder Head Kit - Big Twin  -  90-1004\u003cp\u003e\u003cbr\u003eS\u0026amp;S heads give great performance, and work with additional upgrades. Kits are fully assembled, and include stainless steel valves and high-lift springs (up to .640 lift). Intake manifold, pistons and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker box styles). Must reuse stock headbolts. S\u0026amp;S Super Stock piston kits are required and include 10:1 ratio pistons, rings, piston pins and clips (sold separately in pairs). Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136350708021,"sku":"FJHF_90-1004","price":1715.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300007_0.png?v=1784106807"},{"product_id":"s-s-cycle-cylinder-head-kit-90-1499","title":"S\u0026S Cycle Cylinder Head Kit  -  90-1499","description":"S\u0026amp;S Cycle Cylinder Head Kit  -  90-1499\u003cp\u003e\u003cbr\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers. Kit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions. Use OEM manifolds and exhaust. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136351953205,"sku":"FJHF_90-1499","price":1668.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300134_0.png?v=1784106824"},{"product_id":"s-s-cycle-cylinder-head-kit-big-twin-90-1496","title":"S\u0026S Cycle Cylinder Head Kit - Big Twin  -  90-1496","description":"S\u0026amp;S Cycle Cylinder Head Kit - Big Twin  -  90-1496\u003cp\u003e\u003cbr\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers. Kit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions. Use OEM manifolds and exhaust. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136353853749,"sku":"FJHF_90-1496","price":1517.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300015_0.png?v=1784106840"},{"product_id":"s-s-cycle-cylinder-head-kit-big-twin-90-1497","title":"S\u0026S Cycle Cylinder Head Kit - Big Twin  -  90-1497","description":"S\u0026amp;S Cycle Cylinder Head Kit - Big Twin  -  90-1497\u003cp\u003e\u003cbr\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers. Kit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions. Use OEM manifolds and exhaust. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136359850293,"sku":"FJHF_90-1497","price":1671.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300017_0.png?v=1784106872"},{"product_id":"s-s-cycle-cylinder-head-kit-big-twin-90-1498","title":"S\u0026S Cycle Cylinder Head Kit - Big Twin  -  90-1498","description":"S\u0026amp;S Cycle Cylinder Head Kit - Big Twin  -  90-1498\u003cp\u003e\u003cbr\u003eHeads come completely assembled with valve seats, valves, guides, seals, .590\" lift valve springs, collars and valve keepers. Kit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket with instructions. Use OEM manifolds and exhaust. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136362996021,"sku":"FJHF_90-1498","price":1517.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300009_0.png?v=1784106896"},{"product_id":"s-s-cycle-cylinder-heads-twin-cam-90-1293","title":"S\u0026S Cycle Cylinder Heads - Twin Cam  -  90-1293","description":"S\u0026amp;S Cycle Cylinder Heads - Twin Cam  -  90-1293\u003cp\u003e\u003cbr\u003eHigh port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications. 79cc heads work great with stock motors for 88\" to 103\" motors; 89cc heads work best for motors over 103\" or with high-compression pop-up pistons. 79cc have 1.940\" intake and 1.575\" exhaust valve and springs for up to .640\" lift; 89cc have 2.000\" intake and 1.605\" exhaust and .640\" springs. Heads are machined for compression releases unless noted otherwise (sold separately); S\u0026amp;S rocker boxes required when using S\u0026amp;S compression releases. Do not include rocker arm components, intake manifold or gaskets. Heads include four long headbolts, and reuse four long OEM headbolts. Accept OEM intake manifolds. Made in the U.S.A.. Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used.. Not compatible with Twin Cooled heads..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136371417397,"sku":"FJHF_90-1293","price":1598.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300058_0.png?v=1784106951"},{"product_id":"s-s-cycle-valve-spring-shim-90-2087","title":"S\u0026S Cycle Valve Spring Shim  -  90-2087","description":"S\u0026amp;S Cycle Valve Spring Shim  -  90-2087\u003cp\u003e\u003cbr\u003e.574\" x 1.450\" x .030\". Black, steel construction. 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Must use S\u0026amp;S rocker boxes (PART #90-4110) if S\u0026amp;S compression releases are used..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53136391897397,"sku":"FJHF_900-0251","price":1580.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300139_0.png?v=1784107104"},{"product_id":"s-s-cycle-compression-release-kit-90-4915","title":"S\u0026S Cycle Compression Release Kit  -  90-4915","description":"S\u0026amp;S Cycle Compression Release Kit  -  90-4915\u003cp\u003e\u003cbr\u003eElectric compression releases open when you press the start button and close when the button is released. Manual compression releases are opened manually and close when the motor starts. Kits include the required parts for installation. For ease of installation and removal, a special socket can be purchased separately. Not for use on OEM heads. 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Will work with 19 cc, 20 cc, 21 cc and 22 cc Pro Design cool domes.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Pro Design","offers":[{"title":"Default Title","offer_id":53142931308853,"sku":"FJCR_PD300","price":270.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/PD300YH_0.png?v=1784173837"},{"product_id":"pro-design-cool-domes-banshee-yfz350-19-cc-pd305","title":"Pro Design Cool Domes - Banshee YFZ350 - 19 cc  -  PD305","description":"Pro Design Cool Domes - Banshee YFZ350 - 19 cc  -  PD305\u003cp\u003e\u003cbr\u003eBillet-machined design offers noticeable bolt-on performance gains. 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Clean up the look of your engine. Reduce backfire. Do not require re-tuning of carburetors or fuel injection systems. Blend seamlessly with engine. Easily installed by most owners. Removal of this system may not be legal in some states. Made in the U.S.A..\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Baron Custom Accessories","offers":[{"title":"Default Title","offer_id":53175022813493,"sku":"FGZD_BA-2571-00","price":28.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300055_0.png?v=1784413553"},{"product_id":"cylinder-works-cylinder-head-kit-honda-ch1001-k01","title":"Cylinder Works Cylinder Head Kit - Honda  -  CH1001-K01","description":"Cylinder Works Cylinder Head Kit - Honda  -  CH1001-K01\u003cp\u003e\u003cbr\u003eNew replacement cylinder head. Include cam caps and cam cap bolts. Include C630 (nickel\/aluminum\/bronze) valve seats and guides. Competition valve job. Shortened valve guides to accept higher lift cams. Unshrouded combustion chamber. Blended bowl seat to port. Stock shaped ports. Does not include valves, springs or lifters. Made in the USA.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Cylinder Works","offers":[{"title":"Default Title","offer_id":53178209173813,"sku":"FHGM_CH1001-K01","price":521.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300127_0.png?v=1784436221"},{"product_id":"cylinder-works-cylinder-head-kit-honda-ch1003-k01","title":"Cylinder Works Cylinder Head Kit - Honda  -  CH1003-K01","description":"Cylinder Works Cylinder Head Kit - Honda  -  CH1003-K01\u003cp\u003e\u003cbr\u003eNew replacement cylinder head. Include cam caps and cam cap bolts. Include C630 (nickel\/aluminum\/bronze) valve seats and guides. Competition valve job. Shortened valve guides to accept higher lift cams. Unshrouded combustion chamber. Blended bowl seat to port. Stock shaped ports. Does not include valves, springs or lifters. Made in the USA.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Cylinder Works","offers":[{"title":"Default Title","offer_id":53178212090165,"sku":"FHGM_CH1003-K01","price":521.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4697\/0933\/files\/09300129_0.png?v=1784436238"},{"product_id":"cylinder-works-cylinder-head-kit-honda-ch1002-k01","title":"Cylinder Works Cylinder Head Kit - Honda  -  CH1002-K01","description":"Cylinder Works Cylinder Head Kit - Honda  -  CH1002-K01\u003cp\u003e\u003cbr\u003eNew replacement cylinder head. Include cam caps and cam cap bolts. Include C630 (nickel\/aluminum\/bronze) valve seats and guides. Competition valve job. Shortened valve guides to accept higher lift cams. Unshrouded combustion chamber. Blended bowl seat to port. Stock shaped ports. Does not include valves, springs or lifters. 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