I built my muffler which is basically perforated, straight through pipes inside a megaphone for each bank and the banana is gutted and filled with fiberglass. The megaphones have large holes through the wall where they are within the banana and there is steel wool around the inner, perforated pipe and the megaphone. This is basically like 911R muffler except for the fiberglass.

The result is the high frequencies are muted which I miss hearing. I'm thinking of opening it back up enough to remove the steel wool & fiberglass.

I have been told that Ed Mayo's exhaust is rather nice so I hope to hear from you Ed & some details of your muffler build.

Name:  P1090093.jpg
Views: 322
Size:  74.8 KB

Construction details.

Name:  P1090118.jpg
Views: 315
Size:  103.5 KB

Trial installation.