I had mine done, although I can't comment on the "93 octane" custom program. I was told by the distributor that the current file available is for 93 octane although it can run on 91.


Regardless of what is true or not, it seems that there is a bit of a communication problem with this company.

I have the Borla Exhaust installed as well. 04 Crossfire Limited. Do I notice a difference? (although not directed at me, i feel like more than one voice is good)

The "butt dyno" is a tough one to really be discernable with, especially when you are talking about a 10-20 hp potential gain on a car that already has close to 220 hp. I notice a difference in the car and it does seem to have a better pull. It seems apparent at 3500 to 4500 rpms (to me). However, I have yet to take it to the track to see what difference exists (if at all). I know another crossfire owner who has a complete stock. I badger him every day to take it to the strip. Hopefully I'll be lucky one day.