BMW E82 E88 E90 E91 E92 E93 E70 E71 E84 N55 JB4 Tuner

JB4 tuner for stock or modified N55 engines in the listed BMWs. Delivers up to 60hp and 60lb ft torque at the wheels with no supporting mods required.

• Plug-and-play fit: no coding, no ECU flash, no tools
• 8 preloaded maps including pump fuel, E85, water/methanol and full-mod support
• Real-time logging via free JB4PRO app (iOS/Android)
• Fully reversible: no VIN lock, no trace left on the ECU
• 5-year warranty, lifetime firmware updates, UK-based support