DOC #CERT-3C77-F061-C4AA
12.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
12.09.2026
BMW 4 serie GC
F36 - May/2016 - 2021 420i 184hp Petrol
Original
184HP
270 Nm
Stage 1
250HP
440 Nm
+66 HP / +36% +170 Nm / +63%
Estimated Power and Torque Curve
Customer
Chassis
Date
Signature
Stamp
NOTICE: This document represents estimated values based on database information. It is not valid as official certification without the original handwritten signature and physical stamp of the authorized technician. Performance values may vary based on vehicle condition, fuel quality and operating environment.