I went with the chambered muffler and exhaust kit from MidAmerica. Absolutely love the sound! It makes that nice ripping noise when you are on it, and is nice and loud with a good burble at idle. I think it sounds a lot like the old glass packs, but it is up to each ones ear. I wanted it loud and proud and that is what I have. They sell them for both header and stock manifold set ups. the tailpipes are just two single 2.5" pipes at the back. Good luck.
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C3: 1979 Corvette Coupe, Auto, L-48, Red/Doeskin (my wife's fave);
C4s: 1986 C4 coupe (SCCA road race car), satin black, 4+3, Z51 package, L-98; & 1993 C4 coupe, white, 6-speed, LT-1.