GLS63 Tune — Stage 1

AMR Performance develops GLS63 software as 2 separate files, not one calibration reused across a range. Installation is comport pro -or- dealer flash. These cover the GLS (X167) chassis, each written for that car's engine and gearbox combination. The list includes ECU calibrations and CPC tuning, which can be run individually or together. All current files are built for 91/93 Octane pump fuel — no race fuel and no hardware changes required. Every calibration listed here ships as a Stage 1 tune; the power figures for each are on its own product page.