[brusk]

I don't think you can properly add octane booster from the autoparts store to get from 91 octane to the required 93. All the factory parts are more than adequate to run the Stage 1 OTS maps. I would first start with running a 91 map to see if this fixes any drive-ability or smoothness complains and try both linear and stock maps. If there's still concerns or parts you don't like make sure your on the latest version of the map and post up some logs and I'm sure somebody here can comment on anything they are seeing assuming you can properly describe what it is your feeling that your not liking.