DOC #CERT-EE47-1BCE-5122
13.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
13.09.2026
Buick Rainier
2004 - 2007 4.2 V8 279hp Petrol
Original
279HP
373 Nm
Stage 1
295HP
395 Nm
+16 HP / +6% +22 Nm / +6%
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.