I can not give you many particulars as I bought it fairly recently as a "consignment car" without the opportunity to talk to the PO, but my 1991 SE has a MagnaFlow one into two muffler with duals, and a "V-8 type" rear valance to accomodate the dual pipes. I have no idea if it's actually one from a real V-8 or whether it was custom made from the original one. It has (see pic attached) two slash-cut chrome pipes similar to the pre-2002 V-8's.
As far as the muffler system is concerned, they are pretty loud. When the exhaust solenoid opens up, you can really hear the difference! It is a "single chamber" as opposed to a "double chamber" system which I have been told is no longer being made. I have been told that the system was originally used on Camaros and Firebirds. I have been told that the two chamber would be quieter, but there may well not be enough room up there to fit one of them, even if they were still available.
It is NOT a stainless system and I don't really believe that it was designed with performance in mind. The welds are already showing some rust so it will likely fall apart in a few years and I will be looking at having to fit another system at that point.
The MagnaFlow web site has them listed in the $500 dollar range.
I personnaly don't mind the sound level, except at freeway cruising speeds I get a little eardrum vibration if the windows are closed and the glass top is closed. This goes away if I crack the glass top a little.
My car also has the "ram air" mod (see the Lotus World web-site) and frankly I think you will gain more performance from that than a muffler system. This mod results in a slight increase in interior noise, too.
Last edited by wa6rxm; 04-12-2010 at 11:06 AM.