1998 TJ, 4.0, 5sp.
The exhaust usually smells fine, like any other car with the catalytic converter working. However, when I take my foot off the gas in 5th and start coasting, I get a bit of exhaust smell as if the cat is not working - smells like motorcycle exhaust.
Think it's just running rich on decel? Or the cat cools down and stops working?
If it is the cat, are they fairly DIY replaceable? Do I need to mig weld it in there? Are the clamp-on ones any good (ie, do the clamps seal the exhaust in?)