Item 2 has been answered in your duplicate post.
For items 1 and 3, sounds like you should have exhaust inspected at muffler shop if you are unable to check yourself
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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