The muffler shop did me right on the exhaust system. It came out 40 bucks higher than initially quoted, but I have been using this guy for 17 years, so I expected that from past jobs.
It's 2 inch dual exhaust, aluminized pipe, Brockman Mellowtone steel packed mufflers through 2 inch pencil tips.
For you non car people, the engine's idle is supposed to be irregular like that. It's the camshaft that causes it.