We'll my four muffler setup is a winner for me. Its not pretty right now as its bolted on for trial purposes... But Its all straight through. No cats. Minimal drone. No rasp. Clean sounding befitting a Lincoln IMO. I used basically magnaflow knock offs... Two dual in dual out mufflers replace the third cat and resonator. And two offset outlet mufflers at the factory location.
They are Total Flow brand off amazon with Livernois catless DPs.