Hi Samsung001, I have not had the car on a dyno, but will hopefully if there is another dyno day. Apart from a much better sound, from the seat of my pants, I think I have more performance than standard. I think I have more mid torque and it did perform much better on the track than the previous session.
Yes, I did disconnect the battery while I installed all (about 2 hours) and I assume this reset all.
Get the Greddy!