I have a magnaflow 3" in/ (2) 2.5" out dumper before the axle on my nitrous fed hemi. Problem is that there is a wicked resonance at 2000-2100 rpms which just happens to be my rpm at 70 mph on the highway. I don't want to pipe it out the side or the back as it looks really clean without exhaust tips showing.
I would mind adding a resonator or another small muffler inline with the piping. I figured this board could come up with something.