WJ,
In that pic it would seem so...I am having trouble uploading pic showing side view. In any case, exhaust gas also exits through the spaces between the discs (more discs, more flow/less discs,more back pressure)
Also, I'm offering this as a more economical/easier solution than the cost of a whole new muffler/install. As ventilated as mine is, I don't know if it is much more restrictive than a quieter muffler,but it works for me. YIKES!, I never noticed how grody my exhaust was until I saw the pics.YUK!![]()
Ldub