It may be worth checking the tune to see the AF at WOT. The RAI (or CAI) can sometimes alter the tune into the unsafe region. If you have a datalogger you can log the fuel trims and see how close the calibration is. If its in calibration you will not gain much by getting a tune. If its a ways off then you may gain a little. there is about a 15hp gain by running 91+ octane and higher timing values.