Performance Tuner

The Burger JB4-S55 tuner is a plug-and-play performance upgrade for S55-powered BMW M2 Competition, M3, and M4 models from 2015-2022. It interfaces with your vehicle's sensors and ECU to safely increase power and torque, offering gains of up to 80 wheel horsepower and 100 lb-ft of torque on pump gas, and up to 120 wheel horsepower and 140 lb-ft of torque on higher octane fuels or E85 mixtures. The JB4 provides a smooth, stock-like driving experience with no impact on fuel economy during normal driving and is fully reversible with no splicing or cutting of factory wires required. Key features include free Bluetooth app control via the JB4PRO adapter, allowing you to monitor and analyze vehicle data, change performance maps, and update firmware wirelessly. The tuner supports various fuel types with multiple pre-loaded maps, including a race gas map requiring 100 octane and E85 mixtures, and a methanol injection map. It also offers boost-by-gear control for improved traction and supports exhaust flap operation on compatible vehicles. The JB4 includes advanced CANbus diagnostic tools to read and delete fault codes, and can log up to 40 engine parameters. Installation is described as quick and plug-and-play. The tuner comes in a durable billet aluminum enclosure, is designed and assembled in the USA, and is backed by a 5-year warranty. It is compatible with various ECU flashes, including factory, competition, off-the-shelf, and custom maps. For vehicles with aftermarket Tial wastegates, a special version of the JB4 is available upon request. This JB4 tuner is specifically designed for the S55 engine found in: * **BMW M2:** 2018-2022 F87 M2 Competition (S55 engine only) * **BMW M3:** 2015-2020 F80 M3 * **BMW M4:** 2015-2020 F82/F83 M4, M4 GTS, M4 CS