{"product_id":"s58-jb4-tuner-for-bmw-g80-m3-g82-m4-g87-m2","title":"JB4 Tuner for S58 Engine for 2021+ BMW G80 M3, G82 G83 M4, \u0026 2023+ G87 M2","description":"\u003cstyle\u003e.va-table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}\u003c\/style\u003e\u003ch2\u003eJB4 Tuner — BMW S58 (G80 M3, G82\/G83 M4, G87 M2)\u003c\/h2\u003e\u003cp\u003eAround 80 wheel horsepower and 100 lb-ft on pump gas, and up to 150whp \/ 175wtq on higher octane or E85 — with the factory ECU completely untouched. The JB4 talks to the S58 through its sensor network and CANbus, which is why it works on locked DMEs and doesn't break when BMW pushes an over-the-air update. Install is plug-and-play, no wire splicing, and fully reversible.\u003c\/p\u003e\u003ch3\u003eJB4 or JB4PRO?\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBoth include the JB4PRO Bluetooth adapter and the free app.\u003c\/strong\u003e Wireless map switching, live gauges, datalogging and firmware updates from your phone are standard either way — the PRO is not \"the one with Bluetooth.\"\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eJB4PRO\u003c\/strong\u003e is a different board built for heavily modified cars. On top of everything the standard JB4 does, it adds:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect \u003cstrong\u003eethanol sensor\u003c\/strong\u003e control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort injection \/ CPI \/ WMI\u003c\/strong\u003e control via the PnP add-on harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel pressure control\u003c\/strong\u003e for advanced tuning on ethanol mixtures — built in, no upgrade kit needed\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOnboard datalogging memory\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAdditional high-current outputs for extra pumps, relays and solenoids\u003c\/li\u003e\n\u003cli\u003eAdditional inputs for monitoring external sensors\u003c\/li\u003e\n\u003cli\u003eBluetooth and memory on the board itself rather than via the adapter\u003c\/li\u003e\n\u003cli\u003eCANbus integration with flash tuning\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eStock or bolt-ons? The standard JB4 is the right call. Building toward E85, port injection or meth? Go PRO.\u003c\/p\u003e\u003ch3\u003eWhat it does\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMultiple switchable maps including E85 ethanol blends\u003c\/li\u003e\n\u003cli\u003eBoost-by-gear limiting — essential on an S58 putting power down in the low gears\u003c\/li\u003e\n\u003cli\u003eLive gauges, datalogging, fault code read and clear\u003c\/li\u003e\n\u003cli\u003eNot VIN-locked — transfers between cars\u003c\/li\u003e\n\u003cli\u003eFree firmware updates · 5-year warranty · designed and assembled in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVEHICLE APPLICATIONS\u003c\/h3\u003e\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ Model\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW M3, M3 Competition (incl. xDrive)\u003c\/td\u003e\n\u003ctd\u003eG80\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW M4, M4 Competition (incl. xDrive)\u003c\/td\u003e\n\u003ctd\u003eG82\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW M4 Convertible\u003c\/td\u003e\n\u003ctd\u003eG83\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW M2\u003c\/td\u003e\n\u003ctd\u003eG87\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2023+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eDriving an X3M or X4M? Use the \u003ca href=\"\/products\/jb4-tuner-for-s58-2020-bmw-f97-x3m-f98-x4m\"\u003eS58 JB4 for the F97\/F98 chassis\u003c\/a\u003e instead.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eRunning E85 on a standard JB4?\u003c\/h3\u003e\u003cp\u003eAdd the \u003ca href=\"\/products\/jb4-fuel-pressure-upgrade-kit-b58-s58-b48-supra\"\u003e\u003cstrong\u003eJB4 Fuel Pressure Upgrade Kit\u003c\/strong\u003e\u003c\/a\u003e for direct fuel pressure and fuel trim control. \u003cem\u003eSkip it if you're buying the JB4PRO — that's already built in.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003ePrefer a flash tune?\u003c\/h3\u003e\u003cp\u003eWe also carry the \u003ca href=\"\/products\/mhd-super-license-for-s58\"\u003eMHD Super License\u003c\/a\u003e and the \u003ca href=\"\/products\/bootmod3-s58-bmw-f97-f98-x3m-x4m-competition-tune\"\u003ebootmod3 tune\u003c\/a\u003e for the S58.\u003c\/p\u003e","brand":"Burger Motorsports","offers":[{"title":"JB4","offer_id":52520088502552,"sku":null,"price":799.0,"currency_code":"USD","in_stock":true},{"title":"JB4PRO","offer_id":52520088535320,"sku":null,"price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/BMW-S58-JB4-Tuner_3067269b-2e98-4a6c-9da7-9c6eefd841e5.jpg?v=1786740658","url":"https:\/\/speedlogicauto.com\/products\/s58-jb4-tuner-for-bmw-g80-m3-g82-m4-g87-m2","provider":"SPEED LOGIC","version":"1.0","type":"link"}