I have the 1 tranny only 2tow tune and 3 93 performance. My question is should i change my 1and 2 from trans only and tow tune to a 87 performance and a 89 peformance. I never tow anything and will never use tranny only . is it worth it to change .If I do change them how hard is it to do that and is there a fee . well Im sure theres a fee its my screw up not theres
. thanks for the info