{"product_id":"thundermax-electronic-control-module-ecm-ecu-for-harley-davidson-309-605","title":"ThunderMax Electronic Control Module ECM ECU for Harley-Davidson 309-605","description":"\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003eThunderMax USA Electronic Control Module ECM \/ ECU for Harley-Davidson Touring Center Cooled Models VVT or non-VVT.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cb\u003eFor the best buying experience: r\u003c\/b\u003e\u003cb\u003eead the whole advert, ask as much as you like, and then buy.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan\u003eBrand new. Packaging opened for pictures only.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cb\u003e\u003cu\u003eFrom ThunderMax website:\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan\u003e\u003ci\u003e\"ThunderMax is a performance-driven, award-winning ECM built exclusively for EFI-equipped Harley-Davidson® motorcycles. Designed as a stand-alone replacement for the factory ECM, the 309-605 arrives fully assembled with wide-band oxygen sensors, plug-in harness, AutoTune module, USB communication cable, and everything you need for a straightforward install—no wire-cutting, splicing, or dyno required. At its core, ThunderMax uses proprietary AutoTune technology and a closed-loop control system to continuously read, adjust, and perfect your air\/fuel ratio in real time. With fueling points mapped every 1.5° of throttle and every 256 RPM, the system delivers unmatched precision for smooth, consistent performance in all riding conditions. A built-in barometric sensor accounts for altitude and ambient air changes automatically—just load the map that matches your build and ride. The ThunderMax 309-605 also features knock correction for timing adjustment, adding another layer of performance by adapting ignition timing on the fl fl y. Unlike other aftermarket tuners, ThunderMax fully supports factory features, so your ride modes, Wi-Fi, and navigation all continue to work seamlessly. This ECM is compatible with both VVT and non-VVT bikes. Notice: ThunderMax ECMs utilises 18mm O₂ sensors. Factory exhaust systems are equipped with 12mm ports; however, nearly all aftermarket exhaust systems are manufactured with 18mm ports. If using a factory exhaust, you may weld in 18mm bungs. Bungs are not included.\"\u003c\/i\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cb\u003e\u003cspan\u003eFits 2023.5 Harley-Davidson Touring models (except \u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003cb\u003e2023-Up Road King, 2023-2024 Ultra, and 2023-Up Trikes - see part number 309-591)\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e \u003cu\u003eMessage us with VIN number beforehand and we will double check fitment. Sales will not be processed without VIN check.\u003c\/u\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: large;\"\u003ePN 309-605\u003c\/span\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e\u003cspan\u003eRRP £1346\u003c\/span\u003e\u003cu\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ThunderMax","offers":[{"title":"Default Title","offer_id":52761240797531,"sku":"SP14152","price":1100.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1002\/6421\/4875\/files\/IMG_7172.jpg?v=1775464340","url":"https:\/\/www.steelandspeed.com\/products\/thundermax-electronic-control-module-ecm-ecu-for-harley-davidson-309-605","provider":"Steel \u0026 Speed","version":"1.0","type":"link"}