I really like the sound of the Borla cat back exhaust systems. Not having any drone is a big deal for me, and I know Borla has a great reputation. Do they only offer a cat back exhaust? Is their an option just to replace the muffler? I like my factory black exhaust tips, and just recently had them ceramic coated, so I don't want to replace them. I am looking for a cost effective way to beef up the rumble of the V8 just a little bit. The stock exhaust is a little too quiet for me. I think the Borla Touring or maybe even the S might be good options for me. Thanks in advance for your help. I apologize for this extreme newbie question, but I don't know a lot about exhaust systems, just that I like the one's that have a nice V8 rumble to them.