{"product_id":"toyota-gr-yaris-gr-corolla-jb4-tuner","title":"Burger Motorsports JB4 Plug \u0026 Play Piggyback ECU Tuning Box for Toyota GR Yaris (2021+) \u0026 GR Corolla (2023+) 1.6 Turbo","description":"\u003cp\u003eUnlock serious performance from your Toyota GR Yaris or GR Corolla with the JB4 plug and play tuner. Designed for the 1.6 turbo three-cylinder engines, this proven piggyback tuning box works seamlessly with the factory ECU to increase boost while optimising timing and fuelling. On a stock car you can see gains of up to 50 whp and 60 wtq at the wheels, with crisp throttle response and reduced turbo lag, all without flashing the ECU. Available in the UK from Nforcd.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTrue plug and play installation to two easily accessed engine bay sensors, and removable without a trace\u003c\/li\u003e\n  \u003cli\u003eOperates with factory ECU strategies to remap boost, timing and fuelling for smooth, reliable power\u003c\/li\u003e\n  \u003cli\u003eHigh-speed 64 MHz processor samples sensors up to 800 times per second using dedicated 10-bit converters for refined control\u003c\/li\u003e\n  \u003cli\u003eFull CANbus integration for advanced mapping, logging and diagnostics, including boost, timing, air\/fuel, fuel trims, throttle and knock control\u003c\/li\u003e\n  \u003cli\u003ePreloaded JB4 software for Toyota GR platforms with up to 8 selectable maps to suit fuel quality and basic modifications\u003c\/li\u003e\n  \u003cli\u003eEthanol compatible maps, including E85 where available\u003c\/li\u003e\n  \u003cli\u003eRead and clear fault codes directly through the JB4 system\u003c\/li\u003e\n  \u003cli\u003eMonitor and record up to 40 live gauges via the JB4 app\u003c\/li\u003e\n  \u003cli\u003eBoost by gear control in 1st, 2nd and 3rd via the optional JB4 PRO app to help perfect your launch\u003c\/li\u003e\n  \u003cli\u003eOptional JB4 PRO Bluetooth adapter connects to iOS and Android for wireless logging, map switching and free firmware updates\u003c\/li\u003e\n  \u003cli\u003eRuns with all driving modes and leaves fuel economy unchanged during normal driving\u003c\/li\u003e\n  \u003cli\u003eRequires 91 octane fuel or better for performance gains\u003c\/li\u003e\n  \u003cli\u003eNot VIN locked, so it can be removed and resold in future\u003c\/li\u003e\n  \u003cli\u003eSupplied in a rugged billet aluminium enclosure\u003c\/li\u003e\n  \u003cli\u003eMade in the USA with a 5-year warranty, with ongoing free updates from BMS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2021 onward Toyota GR Yaris 1.6 turbo 3-cylinder\u003c\/li\u003e\n  \u003cli\u003e2023 onward Toyota GR Corolla 1.6 turbo 3-cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you want a fast, reversible upgrade that avoids an ECU remap, the JB4 is a top choice for GR Yaris and GR Corolla owners. Order yours from Nforcd today. Prefer professional installation? Nforcd offers fitting in Warwickshire. Request a quote at Sales@nforcd.com.\u003c\/p\u003e","brand":"Burger Motorsports","offers":[{"title":"2023+ GR Corolla","offer_id":55463224344961,"sku":"Corolla JB4","price":687.7,"currency_code":"GBP","in_stock":true},{"title":"2021-2024 GR Yaris","offer_id":55463224377729,"sku":"Yaris JB4","price":687.7,"currency_code":"GBP","in_stock":true},{"title":"2025+ GR Yaris","offer_id":55463224410497,"sku":"Corolla JB4","price":687.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/9465\/6700\/files\/JB4-tuner-11_67cf889e-0e31-4484-9d8e-21ebb192487a.jpg?v=1774346944","url":"https:\/\/www.nforcd.com\/products\/toyota-gr-yaris-gr-corolla-jb4-tuner","provider":"Nforcd","version":"1.0","type":"link"}