Ill handle in decel
I see some comments about bump steer. If it were a bump steer problem wouldn't it show up when the front end settles after the launch? I am very interested in what you find your problem is because I have a car doing the same thing. I did find on mine the left lower control arm was very tight. I haven't had it back out yet to see if this fixed my problem. I'll let everyone know if it does.
Thanks TS1955