DOC #CERT-53E4-8663-3297
25.10.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
25.10.2026
BMW Z4
G29 - 2019 -> • 30i 258hp • Petrol
Original
258HP
400 Nm
➤
Stage 1
278HP
450 Nm
▲ +20 HP / +8% ▲ +50 Nm / +13%
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.