Someone correct me if I'm wrong but stock is 1.75" to my knowledge. Also I got a magnaflow 2.25" cat back cost me 400 bucks. Getting a muffler seems like a waste to me but everyone has their taste. Just figured I'd let you know about this option.
I bought my exhaust system from mandrel exhaust.. It's pretty awesome.. I don't know if the link will work but this is what I bought for $500 dollars. 2.5 inch downpipe with optional bung, flex braid pipe with cat and 2.5 inch exhaust pipe with the 6 inch round magnaflow exhaust muffler. My shipping was $45.. Grand total was $505. I bought this a little over a year ago. https://www.mandrelexhaustsystems.com/cart.php?suggest=55d7a789a69d5