I have argued in the past that CAI's are worthless, I now have more track data to back that claim up. I have 2 91 Octane race tunes from Doug at Bamachips, one is for a JLT CAI, the other is for the stock airbox. Sunday, 3 May 09, I made 6 passes, 3 with the stock air box, 3 with the JLT CAI. Best time and MPH was on the same pass, which happened to be with the stock air box. After DA correcting all 6 passes and averaging them out for each airbox setup. MPH with the stock airbox was slightly higher and E.T. was slightly lower than the JLT CAI which has been considered to be the best HP producing CAI. Personally, I wouldn't run a CAI unless you like the looks of it.