{"product_id":"harddrive-hd-performance-coils-40v-hp-single-fire-coil-twin-cam-efi-820-60409","title":"Harddrive HD Performance Coils - 40v-HP Single Fire Coil Twin CAM EFI — Harley-Davidson Road King, Road King Classic, Electra Glide (2001-2017)","description":"\u003cp\u003eHarddrive HD Performance 40V single-fire coil for Twin Cam EFI Harley-Davidson models, engineered to deliver 30,000 volts with ION Sense feedback compatible with stock EFI systems. Increases peak spark voltage by 20% or more to improve cold starts, eliminate high-speed misfires, and boost fuel economy.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e30,000-volt high-power output\u003c\/li\u003e\n  \u003cli\u003eION Sense feedback for stock EFI ECU compatibility\u003c\/li\u003e\n  \u003cli\u003eSingle-fire and dual-fire application support\u003c\/li\u003e\n  \u003cli\u003eIncreases peak spark voltage 20% or more\u003c\/li\u003e\n  \u003cli\u003eImproves cold-weather starting and high-speed stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harddrive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 10-2003\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 191361439452\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Output:\u003c\/strong\u003e 30,000 volts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 5 in L × 3 in W × 4 in H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China (Mainland)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits V-twin motorcycles with Twin Cam EFI engines and stock Harley-Davidson fuel management systems.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this coil work with my stock Harley EFI?\u003c\/h3\u003e\n\u003cp\u003eYes — ION Sense feedback is engineered for direct compatibility with Harley's stock EFI ECU without additional tuning or modules.\u003c\/p\u003e\n\u003ch3\u003eDoes this fit both single-fire and dual-fire systems?\u003c\/h3\u003e\n\u003cp\u003eYes — this coil supports both single-fire and dual-fire ignition applications.\u003c\/p\u003e\n\u003ch3\u003eHow much hotter is this spark compared to stock?\u003c\/h3\u003e\n\u003cp\u003ePeak spark voltage increases by 20% or more over OEM specs, resulting in faster ignition and stronger combustion.\u003c\/p\u003e\n\u003ch3\u003eWill this improve my fuel mileage?\u003c\/h3\u003e\n\u003cp\u003eYes — improved spark performance typically increases miles per gallon and overall engine efficiency, especially at highway speeds.\u003c\/p\u003e\n\u003ch3\u003eIs installation difficult?\u003c\/h3\u003e\n\u003cp\u003eSingle coil swap — disconnect the OEM coil and plug in the Harddrive unit. No ECU reflash or tuning required.\u003c\/p\u003e","brand":"Harddrive","offers":[{"title":"Default Title","offer_id":53036026298479,"sku":"820-60409","price":90.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f74a6acb-e47f-4602-8843-f75359e0c102.png?v=1779565174","url":"https:\/\/vtwinbikers.com\/products\/harddrive-hd-performance-coils-40v-hp-single-fire-coil-twin-cam-efi-820-60409","provider":"Vtwinbikers","version":"1.0","type":"link"}