Hi, i have an 04 s60 2.5 awd and wondering what exhaust system is right for me. I saw obx catback but dont no anything about it, or should i go custom, looking for more sound then performance. Suggestions?

 

The exhaust system on these cars is already pretty good. I am assuming you have the 2.5T or is it the 2.4?

All that being said, since the pipes are already quite good simply changing the muffler will be all you need to make it sound nicer. Some have also removed the resonator (pre muffler thing) and welded on just a straight pipe in its place. These mods will make it much louder.
Fyi as a side note. After a lot of work on my 2004 s60 I found that unless you are rebuilding the head with performance parts, installing an "R" exhaust manifold and turbo, theres little more performance improvements you can do before improving the intake.