I have the True Flow intake which also deletes this small muffler as you call it. No cell lights will come on. Its really nothing more than a silencer along the intake tube. I think if you look at Home Depot you should be able to find a circular cap/plug for that size hole. It will make your car growl more. Here is the area he is talking about. It looks like a small box that is connected to the intake tube. Inside of it you will find a white foam silencer. There really is no need for this part other than to quite down the noise level. In fact, this area being removed should provide better air flow. I would suggest buying a 90 degree elbow bend plastic tube from Pepboys and making your own intake tube. It's pretty easy.
This will delete number 6, 7 & 8.
