When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Any auto parts store/muffler shop. You can buy it on eBay. You will have to have someone install it unless you feel comfortable doing the install yourself.
I don't remember, as it was a long time ago when I did mine, but I believe that the flowmaster muffler is shorter than the stock muffler. I simply bought some 2.5" pipe and ran it back from the cat, installed the muffler, and then dropped it out behind the muffler with a 1.5' section of pipe.