Flowmaster is a good brand of muffler. They have several styles and sizes that will work for our trucks (or any truck for that matter). I have a 40 series and paid about 2/3 that price for it from another retailer.
yea, get it from somewhere else. there is nothing special about the mufflers they are selling, just get one with a inlet/outlet diameter of 2 1/4". shop around- anywhere. just google it and you could find one in your area for cheaper.