Should the mufflers on either side really be identical?
Firing order on the two banks of a V8 is not identical.
So sound in pipes is not identical.....
Some years ago after reading about why people go to the trouble of 180 degree headers,
https://www.hotrod.com/articles/180-degree-headers-help-v8s-low-midrange-torque/It occurred to me that same reasoning would lead you to conclude that the two sides of duals should have different mufflers and different tailpipe lengths to avoid drones.
An X-pipe in front of mufflers would partially equalize pulses handled by identical mufflers.
Just my 2 cents....
