I went back to a stock TCU. Even with the ECU redline at 6400 rpm I kept hitting the rev limiter. The Evotech TCU shifted extremely slow. I hated it after a while. Now I have a TCU for the 3:27 ring and pinion I installed. I've heard of successes with TCU tunes but my experiences have been frustrating to say the least. A valve body may be a better option.

Les