I have a 98 with 3.8. The exhaust is all original, and whisper quiet. On my 65 with the 200 6 cyl. I am running a glass pack. I am thinking on the 98 that I might just remove the muffler altogether and just have the cats for muffuling. I did that on a 80 gmc pickup with a 350 engine, and it wasn't loud at all, but the cat was much larger on it. So what do you guys think about running a straight pipe (with a tailpipe of course) ??? I just want some sound, even if it isn't the nice sound of duals. I grew up running straight pipes on almost everything, but I never had any high performance engines then either.