Muffler delete. $175 or so at a local muffler shop. I have a 2005 automatic as well. No drone, I have videos to prove it.
Youtube '2005 corvette muffler delete' my videos are the first two, black car.

 

https://www.corvetteforum.com/forums...ffler-mod.html

Popular old thread on drilling into your mufflers. Worked well for me.

 

FWIW...If you can get to corvettes at carlisle in August, there're a ton of mufflers being replaced when a lot of us are changing them out. I was there last year and had Borla S Type II installed. The pile of mufflers was 6 feet high. Try to get there.

 

Slp loudmouth or loudmouth 2...both under 800 bucks and both have a decent rumble

 

NPP exhaust is the way to go. Then get Wild to Mild switch. Then you can have the rumble when you want and eliminate the drone on the highway by a flip of the switch. You could even open up the mufflers and wrap the inner pipe with a sleeve which will increase the sound. There's a DYI on this forum.

 

The OP does not have the NPP option currently on his car , the mild to wild switch will not work as there is nothing to control .

If the OP goes with the NPP mufflers he will need to purchase a " NPP in a Box " as this kit will have everything he needs to convert his non npp equipped car over

Just don't want him spending money on something he does not need or can't use ......

Dave

 

Nobody seems to like my solution to this dilemma, but I wasn't going to spend the kind of money it would take to retro-fit my Vette with the B&B Fusion with remote (about $2,000 plus installation). I bought QTP low profile electric cutouts with turn downs and a remote for $400 and had a local exhaust shop install them for another $400 (kind of a screw job). Now I have rumble when I want rumble, which is most of the time, and I have that stock "Toyota Camry" exhaust sound when I want it, which is almost never. Everything is controlled from the driver's seat by the little remote. The nice part is that you can run with any amount of "openness" that you like, which you can't do with either the factory NPP or the Fusion system. They are just on or off. I usually click the open button until I just begin to hear a little burble from the exhaust. Beats the heck out of spending well over twice as much for a less controllable result. BTW, even the muffler shop guy, who really wasn't that enthusiastic about the cutouts, was impressed with how good the Vette sounded with the cutouts open. Probably because of the extra set of CATs that the EPA forced Chevy to put on the car in that recall of '09s. They've been on my car for almost six months now. We'll see if the electric motors will hold up, but QTP says they will.