DOC #CERT-65D2-11DC-A234
11.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
11.09.2026
Porsche 911
2011 - 2015 ( 991 ) GT3 3.8i 475hp Petrol
Original
475HP
440 Nm
Stage 1
500HP
470 Nm
+25 HP / +5% +30 Nm / +7%
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.