Cost for dual exhaust?

I had one single custom pipe with a chambered muffler put on my turbo system. He bent a downpipe for it, welded a V-band flange on, 02 bung, some swooped 45s to get under the car (all in one section of pipe - bent not welded) and then ran 2 1/2 to the muffler, and out below the bumper for a slant.

That cost $180. I could image if it was duals it would be $400 maybe.

That was at ABC muffler, Benicia Ca.

They do lots of custom stuff, and can make whatever you're thinking of in your head, and usually have a turn around (that I've seen) of 1 to 2 days. They get swamped.