Is there a high performance shift kit from Superior for my 97 trans am a4? It was already a built trans from CRT. The CRT was installed before i bought the car. Anyway the mechanic rebuilding my tranny said a Superior shift kit is about 138 bucks. So far i can't seem to find this shift kit he priced me. I found other Superior shift kits, but not exactly for the 4L60E at this price.