Just Installed Hypertech III

[Centerfire]

I have mine set for 93 octane.. Truthfully can not tell difference when it has 87 or 93 octane in it.. I have better peformance due to the shift point changes ( I think).. I'm in the same point as you.. can't decide on exhaust..
I have not put enough miles on it to tell. I was averaging 10.3 even after adding the Gobi roof rack and lights.. Time will tell of course I really don't care about fuel mileage.

Mike
Mike

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Nitrobooger:
I installed my Hypertech III and Air force one cold air intake, and I have noticed a difference of at least a mile or two better in fuel economy. Mine is set a 87 octane. Still trying to decide on which exhaust sytem to go with too.<HR></BLOCKQUOTE>