{"product_id":"twin-power-08-17-fxst-flst-voltage-regulator-black-replaces-h-d-74540-08-40-amp","title":"Twin Power 08-17 FXST FLST Voltage Regulator Black — Fits Harley-Davidson","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout TwinPower\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eTwinPower engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full TwinPower lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTwin Power Black Voltage Regulator for Harley-Davidson FXST \u0026amp; FLST Models (2008-2017)\u003c\/h2\u003e\n\u003cp\u003eMaintain the integrity of your Harley-Davidson's electrical system with this essential Black Voltage Regulator from Twin Power. Designed as a direct replacement for Harley-Davidson part number 74540-08, this 40 Amp regulator ensures consistent power delivery, keeping your battery properly charged and all your motorcycle's electronics functioning smoothly. Its sleek black finish offers a subtle, clean look.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Benefits:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact Fit:\u003c\/strong\u003e Replaces H-D# 74540-08 for a hassle-free installation on compatible models.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Performance:\u003c\/strong\u003e Built to Twin Power's high standards for dependable operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStealthy Black Finish:\u003c\/strong\u003e Complements a variety of custom aesthetics.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e40 Amp Output:\u003c\/strong\u003e Sufficient amperage to handle the electrical demands of your ride.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtensive Fitment:\u003c\/strong\u003e Covers a wide range of Harley-Davidson FXST and FLST motorcycles from 2008 through 2017, including popular models like Heritage Softail Classic, Fat Boy, Fat Boy Lo, Cross Bones, Rocker, Rocker C, Blackline, CVO Softail Convertible, and Softail Custom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVehicle Compatibility:\u003c\/h3\u003e\n\u003cp\u003eThis voltage regulator is compatible with the following Harley-Davidson models:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2017\u003c\/strong\u003e FLSTC Heritage Softail Classic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2017\u003c\/strong\u003e FLSTF Fat Boy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2010-2017\u003c\/strong\u003e FLSTFB Fat Boy Lo\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2014-2015\u003c\/strong\u003e FLSTNSE CVO Softail Deluxe\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2011\u003c\/strong\u003e FLSTSB Cross Bones\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2010-2012\u003c\/strong\u003e FLSTSE CVO Softail Convertible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2009\u003c\/strong\u003e FXCW Rocker\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2011\u003c\/strong\u003e FXCWC Rocker C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2011-2013\u003c\/strong\u003e FXS Blackline\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2013-2014\u003c\/strong\u003e FXSBSE CVO Breakout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2009\u003c\/strong\u003e FXSTB Night Train\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2008-2010\u003c\/strong\u003e FXSTC Softail Custom\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDon't let a faulty regulator leave you stranded. Ensure your electrical system is in top shape with this Twin Power Black Voltage Regulator from GGCRACING!\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;\"\u003e\n\u003ch3 style=\"margin:0 0 8px;\"\u003eVehicle Fitment\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:0.92em;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#f0f0f0;text-align:left;\"\u003e\n\u003cth style=\"padding:6px 10px;\"\u003eYears\u003c\/th\u003e\n\u003cth style=\"padding:6px 10px;\"\u003eMake\u003c\/th\u003e\n\u003cth style=\"padding:6px 10px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:6px 10px;\"\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2008-2017\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFLSTC Heritage Softail Classic\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2008-2017\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFLSTF Fat Boy\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2010-2017\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFLSTFB Fat Boy Lo\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2014-2015\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFLSTNSE CVO Softail Deluxe\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2010-2012\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFLSTSE CVO Softail Convertible\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2008-2009\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFXCW Rocker\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2008-2011\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFXCWC Rocker C\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2011-2013\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFXS Blackline\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2013-2014\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFXSBSE CVO Breakout\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003e2008-2010\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eHarley-Davidson\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eFXSTC Softail Custom\u003c\/td\u003e\n\u003ctd style=\"padding:4px 10px;border-bottom:1px solid #eee;\"\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular TwinPower products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/twin-power-84-91-evolution-big-twin-top-end-gasket-kit-replaces-h-d-17033-83b-3-5-inch-bore\" style=\"color:#0066cc;text-decoration:none;\"\u003eTwin Power Evolution Big Twin Top End Gasket Kit - 3.5 Inch Bore\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/twin-power-91-03-xl-883-top-end-gasket-kit-replaces-hd-17032-91-std-bore\" style=\"color:#0066cc;text-decoration:none;\"\u003eTwin Power XL 883 Top End Gasket Kit - STD Bore\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/twin-power-91-03-xl-1200-top-end-gasket-kit-replaces-h-d-17032-91\" style=\"color:#0066cc;text-decoration:none;\"\u003eTwin Power 91-03 XL 1200 Sportster Top End Gasket Kit — Fits Harley-Davidson\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/twin-power-99-17-twin-cam-big-twin-rocker-box-gasket-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eTwin Power 99-17 Twin Cam Big Twin Rocker Box Gasket Kit — Fits Harley-Davidson\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/twin-power-84-91-evo-big-twin-rocker-box-gasket-kit-replaces-h-d-17038-90\" style=\"color:#0066cc;text-decoration:none;\"\u003eTwin Power 84-91 Evo Big Twin Rocker Box Gasket Kit — Fits Harley-Davidson\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Twin Power 08-17 FXST FLST Voltage Regulator Black \\u2014 Fits Harley-Davidson\",\"description\":\"Keep your Harley-Davidson FXST\/FLST powered with this Twin Power Black Voltage Regulator (08-17). Replaces H-D 74540-08. Order yours at GGCRACING!\",\"brand\":{\"@type\":\"Brand\",\"name\":\"TwinPower\"},\"mpn\":\"498259\",\"url\":\"https:\/\/ggcracing.com\/products\/twin-power-08-17-fxst-flst-voltage-regulator-black-replaces-h-d-74540-08-40-amp\",\"offers\":{\"@type\":\"Offer\",\"price\":\"108.99\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/twin-power-08-17-fxst-flst-voltage-regulator-black-replaces-h-d-74540-08-40-amp\",\"sku\":\"TWP498259\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"TwinPower\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=TwinPower\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Twin Power 08-17 FXST FLST Voltage Regulator Black \\u2014 Fits Harley-Davidson\",\"item\":\"https:\/\/ggcracing.com\/products\/twin-power-08-17-fxst-flst-voltage-regulator-black-replaces-h-d-74540-08-40-amp\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Twin Power 08-17 FXST FLST Voltage Regulator Black \\u2014 Fits Harley-Davidson fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Use the fitment table above to confirm.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for TwinPower?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Twin Power 08-17 FXST FLST Voltage Regulator Black \\u2014 Fits Harley-Davidson?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"TwinPower","offers":[{"title":"Default Title","offer_id":41492027080788,"sku":"TWP498259","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/00f6c1237e728cb165510f9dd199b9eeL.jpg?v=1737947984","url":"https:\/\/ggcracing.com\/products\/twin-power-08-17-fxst-flst-voltage-regulator-black-replaces-h-d-74540-08-40-amp","provider":"GGCRACING INC","version":"1.0","type":"link"}