This is an aggressive Stage 2+ (often called Stage 3) performance calibration for the VW Golf 5 GTI, designed for a full K04 turbocharger conversion. This tune, for the Bosch MED9.1 ECU, is engineered for vehicles that have been extensively modified with a K04 turbo, Audi S3 injectors, a full high-flow exhaust system, and an upgraded intercooler to handle a massive increase in power.
This remap completely transforms the GTI into a serious performance car, capable of surprising much more expensive machinery. By re-engineering all critical engine parameters to suit the larger turbo and upgraded fuel system, this tune delivers a huge and consistent wave of power all the way to redline. This is the definitive software solution for a "K04'd" Golf GTI track build.