I'm considering buying a set of high flow cats for my '13 RT. I understand that sometimes these high flow cats can cause you to run a little lean in open loop. Has anyone been able to get the tune dialed in using an email tune after installing the high flows? I will be installing a wideband O2 sensor once I tackle the headers (which will allow me to dial in using a/f ratio) but won't have the time to tackle that until next year. Any thoughts would be appreciated.