[Roadsters] 1600 exhaust questions

[Ken & Tammy Williams]

I'm not sure what the resonator is, or what it does.  That's the primary 
reason for asking all ya'll. :-)
I had the original exhaust manifold replaced with the coated header, and 
they installed a flex pipe at that time as well, but the rest of the exhaust 
appears to be factory "fresh". So as memory serves, there is a pipe running 
to a muffler near the area of the drivers seat, to a pipe over the rear axle 
to the resonator and the fancy flared exhaust tip.
Eddie, do you recall a specific muffler you used?  Should I just go shopping 
for a new muffler with the approximate dimensions of the resonator?
I should probably just drive it over to my fav exhaust shop and ask them? 
Huh?
Ken Williams
I should be stealing Tim's signature, but not sure how well I'm learning...