I had ordered an exhaust off Ebay for my NA6. It's an unbranded SR-S N1. The price was definitely right, $185 shipped!
It came in and I went ahead and installed it myself. It was a pretty easy straightforward job. The bulk of the work was raising the car up on the stands and lowering it again, plus the clean up and reorganize tools afterwards, etc<
I did have a bit of an issue with some little "L" brackets that came with the kit and I had to modify one of them tio get it to fit right (after I figured out how to mount it).