There are lots of these types of cutouts available online - search electric cutout - for around $150. Some cars have this feature built in stock (think Maserati sport button), and it's used in the Jun B.L. EVC exhaust.
I installed a bunch of those on my customers cars, never had a complaint. I install them right before the rear muffler. I use the company DMH Valves which use a high quality motor and has a warranty. I installed one on my custom exhaust I fabricated.
Im considering adding one to my car when I get my tips done.. but instead of just dumping under the car Its just going to bypass the muffler and go back into the pipe right before the final U-Turn on the solo..
One time my solo pipe broke lose right at that same place and it sounded pretty awesome, but the drone was too much for me..
Now that I have a half-gut on my CAT, It probably wont sound so nice..