There is also the:
Written by Merlin Johnson
Borla [$418 list]
The second exhaust I tried was the Borla stainless muffler, it was damned expensive for just a muffler, the hangers and pipe bends were slightly off. So I had to pay someone else to rebend things around a bit to get everything to fit. Basically, I will never buy a pre-built Borla muffler again. I like the mufflers themselves, but not their quality control in application fabrication. I have a friend (James) with the Stillen and it sounds pretty good, I have the Borla, it is a bit louder at full throttle but VERY quiet at freeway (60-75mph) speeds with no "droning". The early versions of the Borla muffler had restrictors in them, you could look down the tip and see a small diameter "doughnut" welded at the base of the tip, this was supposed to keep noise in check.
In doing a few back to back comparisons with the stock muffler, the Borla and a generic turbo muffler, and with the car having headers; the Borla felt better than the stock muffler as far a top end, but was worse than the turbo muffler as far as bottom end throttle response and top end pull. The Borla was a quieter muffler over all than the turbo style muffler. I have learned later that the turbo style muffler is barely any better than the stock muffler but makes lots more annoying "drone" and noise, thus....is the borla that shitty? I think it was that restrictor, the muffler itself is of good design and their product would be good if you started with just the muffler and made the rest yourself.
The Borla is a full stainless steel muffler with a single "intercooled" tip, as far as performance, it is not worth the money, as far as durability, maybe.
HKS [$440 list]
This is the Trust exhaust system as it was sitting on Jim Wolf Technologie's
floor before installation. I didn't take a picture of the box of gaskets and bolts that
are also included.