AFR (Air fuel ratio) full system exhaust mapping 

AFR Mapping (Air Fuel Ratio) with original BMW file (not the custom tuning) will map of balancing Air/Fuel Ratio in perfection mixed according to BMW calculation for Full System Exhaust. We don't need to worry about it too lean or too rich as per as BMW standard file.

What improves 🔥🔥🔥

✅1. Immediately 4~5 horse power increases at engine.🐎🐎🐎🐎🐎

✅2. No jurking at low RPM

✅3. The Throttle responding balance and accurate with faster acceleration.

✅4. Higher RPM is excellent responses.

✅5. Reduce the engine temperature 🌡️