Originally Posted by $teve
2006 Auto, have Alternative Auto tune using 89. Love the change in shifting and throttle lag reduction. Question is will I notice a difference if I add the C&L CAI and go with either the 89 or 93 tune.
I'm assuming you've used the tuner with the stock airbox. If so, you'll get another 15+ horses switching to the C&L, surely more if you move up to a good mail-order 93 octane tune (BamaChips and Brenspeed come to mind). Think you'd notice that?
Note that if you go to the C&L (or most other aftermarket CAI's), a new tune will be required, no matter what.