Do you have a cobb ap? you can change rev limit on that. from personal experience, I ran my break in map for almost 7k and my tuner emailed me a new map with more boost but same break in map, cuz i couldnt travel to get out to the shop on the dyno. i flashed the new map and now have 13k on the build, runs strong and pulls hard. I wish i could get a protune, just for the lumpy idle shake to be taken care of. and of course hidden potential power gains!!! lol