The JB4 Group 5 tuner is built for non-US MQB-platform 1.8TFSI engines - specifically the UK-spec Polo GTI 6C (2014-2018) and A3 8V (2014-2019). No ECU flashing, no VIN lock, fully reversible.
+45bhp on 95 RON, up to +60bhp with bolt-ons and higher octane
Real-time tuning via free JB4PRO Bluetooth app: adjust boost by gear, log 40+ parameters, monitor AFR and knock
Plug-and-play CANbus integration with rugged billet aluminium enclosure
Lifetime free firmware updates and full 5-year warranty
Track-day sharp or fast-road compliant - it’s your call. Just don’t blame us when the throttle response makes your commute feel like a warm-up lap.
