"...For original parts, Tasca Volvo (www.tascavolvoparts.com) has OEM parts at employee prices and ships to your door..."

Plus, Volvo will give you a lifetime warranty on the mufflers - at least they used to. If you go that route, get the hanger kit also. It gives you all the rubber straps etc needed for a true plug-and-play installation. It's probably a little more expensive to go this way than with some of the aftermarket systems, but you know they'll fit correctly with minimal hassle. The build quality is also predictable.