Installing the Summit 2.5in A body exhaust

When I was shopping Jegs, they sold the 2.5" without mufflers (for only $20.00 less). I thought Summit did also, but I could be wrong. This was two weeks ago. The Pypes system is also sold without, and they offer three choices of mufflers in addition. It's what I went with, and is real pretty, but my neighbors heard a LOT of swearing that day. I still don't know what the deal with the mismatched tailpipes on the Pypes system is. Don't choose Pypes unless you like a challenge.