anybody know where i can get some of these pipes for cheap maybe used even? and are they any goood? (duncan racing pipe for a banshee)

Go to duncanracing.com

They are awesome for the bottom and mid hit, but they are not a top end pipe. Great for duning, but not hill shooting.

Do not buy them direct from Duncan $$$$$$$$. Call your local shops and get a price on them, then go with the cheapest.