Originally Posted by Napalm3nema
You and the OP need to understand that when you deviate from the specific parts indicated for the Cobb off the shelf tune, you should get it protuned at that point. When you get the short ram and catless up pipe, at that point you should be protuned imo for the safest and best results for the mods you put on your car.
That little "imo" Napalm threw in there is important. A protune is NOT mandatory, but as he says, it will provide the best tune for the mods. Cobb does have OTS maps for it's short ram and catless downpipe. You'll want to watch your boost to assure you're not overboosting. There's an OTS map to remedy this as well, should it happen.