Ive got an '02 non-turbo 2.4L S60. im not too new to the s60 "scene", and i understand that NA volvos arent too good to try to build. however, my s60 just hit 100,000 miles and ive come to realize that i'll be keeping her until she dies. ive got the eiback pro-kit installed with 18x8" volvo nebulas (gunmetal). i figure if i cant afford a different turbo volvo, i might as well dress up what ive got since what ive got will be with me for awhile. im looking to complete the upgrading with an exhaust system of some sort. i think im looking for a 2.5" cat-back, but honestly, im no good with exhausts and what i would need especially with the naturally aspirated motor. What company makes the best exhaust for my particular model s60? possibly a mix-n-match exhaust? performance catalytic converter? i am planning on trying to pass emissions later on down the road though, too. links to some good sites would be great!