true duals ? as in fully custom fabricated then ? that's cheap then as long as they do a nice quality install ... muffler alone is about $100 + stainless piping around $50 bux + exhaust tips unless you get one of the mufflers that comes with them + labor, the most expensive part .... the labor involved with making a good quality system like this as a one off item is more than $500 bux ... thats assuming they are using a mandrel bender and stainless piping along with a tig welder ...

if you are not sure if thats the case ... just buy the magnaflow cat back system ... you will never know the difference.