N63TÜ Stage 1 E-Flash Performance ECU Software ESS N63TÜ Stage 1 E-Flash Performance ECU Software 550+ HP / 560 lb-ft tq The E-Flash N63TÜ software is a full OBD2 solution that does not require sending in the ECU or opening the ECU in any way. Expert calibrated ESS Performance ECU... MSRP: Now: $1,349.00 Add to Cart Compare Selected