Have you done a few launches with your new
Mods .. I have found my RS chip worked fine until I had the JunBL mid pipes added ,, mine pulled hard then went in to Limp mode , so I had to back the throttle off ,,perhaps with just axel back delete things may not flow as fast out as with a Cat back exhaust ,, I did have a muffler delete with resonators added after ,, but I believe the cat back release the exhaust quicker !
please let me know under hard throttle is does anything weird ,, thx in advance