The exhaust is an RX. They were the exhaust of choice back in the late 80s early 90s, before the more common muffler/header combo came into vogue. They're obviously an all in one system, and are made from nickel.
They haven't made them for 10 years or so, and as such they very rarely come up for sale (normally 3-4 a year), and when they do come up they're snapped up within minutes (normally by the B289 crowd). In fact I've just sold that one in the picture yesterday, as I'm either selling my van or will be towing with it so the exhaust is no good to me. It sold within 20 minutes of me advertising it.