BMW B58 B48 B46 B38 JB4 Tuning Box F-B46B48B58-JB4

The F-B46B48B58-JB4 is a plug-and-play piggyback tuner for BMWs with B58, B48, B46 and B38 engines - no coding, no cutting, no permanence. Delivers up to 80 whp on B58 and 40 whp on B48, with full control via Bluetooth or laptop.

• 8 preloaded maps: stock, pump, E85, WMI, valet and more - switch on-the-fly
• CANbus integration, boost-by-gear, exhaust valve control, live data logging & fault reading
• Included extended OBDII cable and EWG connector - RHD-ready out of the box
• Billet aluminium housing, made in USA, backed by 5-year BMS repair warranty
• No VIN lock, no subscription, no gimmicks - just proven, enthusiast-grade tuning