Originally Posted by smack

drone totally depends on the exhaust he gets. in my experience, if you buy a good quality exhaust, it's not going to be that obnoxious. my HKS has very little to no drone at highway speed, where as many other similar exhaust that i could have gotten for 1/3 the price that drive me nuts.

also, the CAI may not be necessary. every car has it's own mod path, and responds well to different things, but in most cases i have seen cold air intakes don't really do much good. he may be better off with a cone filter, or even a modified stock airbox.

i would really consider going headers back though for the exhaust. simply replacing just the muffler, or just the cats isn't going to do much good if the rest of the exhaust is still very restrictive.

remember, an exhaust is only as wide as it widest point.

but, whatever you do, enjoy.