Cost for dual exhaust?

You have to be careful who you use. I had a guy do a system once, and he had one of the exhaust pipes rubbing the seam of the gas tank when it was done. It eventually caused the tank to leak...

You get what you pay for...

I never went back to him... I found a place that did custom work after that and he had much better workmanship and was capable of fabricating an H-pipe from scratch.