Gibson makes exhaust systems for the 2005.....can get it in:
"Split Rear Exhaust" (dual, under the bumper)
"Extreme Dual Exhaust" (dual, exits at the corners)
"Dual Sport Exhaust" (dual pipes in the stock location)
"Swept Side Exhaust" (single pipe in stock location)
http://www.gibsonperformance.com/exhaust.asp
And this is a Flowmaster dual exhaust that I've seen on ebay:
http://cgi.ebay.com/ebaymotors/2005-...spagenameZWD1V