Currenlty have a '06 KR w/ 3.73 and 20" factory tires. 88K miles. Gotts mod, 3" mag SISO, KN drop in and a SC 1865 Flaspaq on 87 tune with 18% on shift firmness. Wasn't too impressed with shift firmness. Highest is 20%. Downshifts are still slow unless I lay my foot down in the pedal about 3/4 down.
I used to have a SC 1715 on a 2000 5.4 and remember having set at only mid ways on scale and it had a nice bump in the shifts.

I'm looking at the Troyer VB and is it just a simple remove old and replace with new? I'm not wanting to open up VB and change out springs, etc.

Thanks,
Rob in Atascocita.