DOC #CERT-E4A4-1CF2-65BD
08.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
08.09.2026
Audi RS4
B7 - 2004 - 2008 4.2 FSI V8 420hp Petrol
Original
420HP
430 Nm
Stage 1
440HP
455 Nm
+20 HP / +5% +25 Nm / +6%
Estimated Power and Torque Curve
Stage 2 Available
455 HP / 470 Nm
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.