I have a set of 4 magnaflow exhaust tips, (they used to be attached to Y pipes, making them a set of 2). I took them off my custom exhaust to make way for 4.6 tips, and kept the y pipes from them. so if you have a 3.0 you will probably need a y pipe, or you can just use 2 instead of 4. if you have a 4.4 you can probably weld all 4 on without the y pipe. They cost a little over $100 each for the set of 2 with ypipes new.
$70 shipped for all.
bottom (part chopped off y pipe)
top ( a little dirty but perfect)
all 4