I did a mountain run with a few of my friends the other day and noticed some bog/sputter/hesitation at around 2k-3k RPM.

Happens in almost every gear, when you heavy accelerate at low RPM. Once you pass 3k RPM there is no sputter/bog/sputter. It feels good till around 2.5k RPM and then it hiccups/sputters/bogs/hesitates for a split-second and once it passes 3k RPM it picks up again.

Yes, I do have RTP's installed as well as a full exhaust and I've done my research. It seems like there are others with similar issues who have aftermarket cats/pipes. Some say a tune fixes it and others have gotten the tune and still have the issue!?

I have Stillen V3 CAI's in my basement and I'm thinking about installing them and maybe it won't hesitate/sputter/bog anymore. Honestly, it's not bad if you are daily driving but on the mountain it was more obvious. Car felt great by the way!

Anyone have a concrete reason why this happens? I'm assuming it's going from lean to rich real quick and the ECU hiccups? Will the intake even it out? I'm not planning on getting a tune till next year...

Thanks!