APR Presents the IS38 Turbocharger Upgrade for the GTI, A3, Leon, Octavia and S1!

APR is pleased to present the OEM Golf R/S3 IS38 Turbocharger ECU upgrade for GTI/A3 platform vehicles and the Audi S1!

APR’s IS38 Turbocharger ECU Upgrade is designed for use with the factory Golf R / S3 turbo on GTI/A3 platform vehicles and produces an tarmac-shredding 386 HP on 98 octane fuel! It’s even compatible with the factory downpipe exhaust system, at lower output levels. Expect lightning fast response coupled with smooth daily driving and a much broader power band that pulls all the way to redline!

Using multiple vehicles across the world and in house, APR’s team of Calibration and Electrical Engineers spent the better part of a year mastering the factory Simos 18 engine management system to work seamlessly with the upgraded IS38 turbocharger unit. All critical aspects of the vehicle’s platform were taken into consideration and monitored through APR’s proprietary engine management logging tools to levels often not seen elsewhere in this industry. Through proper mapping, the ECU fully understands the hardware changes and operates correctly. As such torque delivery is smooth and flat, avoiding compressor surge, limitations in …