High performance manifold differences

Deep drone tone inside the car?
Best I found are the Dyno Max turbo muffler.
However, there’s more to sound control than the muffler alone.

A Helmhertz (?) pipe addition helps.
Pressure wave cancellation boxes after the header, before the H or X pipe help.
Moving the muffler rearwards to the bumper instead of under the rear seat helps.
Longer mufflers help a lot.