Stainless and unlike the rest of the original exhaust it's withstood the test of time. Not so for the large hole right behind the muffler in the pipe that goes over the rear axle. lol. I'll be looking for exhaust options also, and again would like to keep it mostly original. Thanks.
Acurite LTD makes a HP single system for those cars. Not cheap but it fits perfectly. Waldron has exhaust as well. Here's a link to a thread about them. Accurate Exhaust