Struggling to find mufflers

Walker's catalog is pretty good - look up the Dynomax Turbo style mufflers for diameter, offsets and lengths.

Another company, maybe a little less prone to drone is Magnaflow
[URL]https://www.magnaflow.com/collections/performance-muffler[/URL]
Same deal, look up size, length offset, etc.

Offset should work better when lining up frpom factory hanger locations to the tail pipes.
H-pipe should be approx 20" after the individual tubes end inside the collector.
Walker exhaust catalog is nearly useless. It forces me to select application (won't work due to engine change), part number (dont know what part i need) or limited description which does not allow me to enter Dynomax. No options to select pipe sizes or configuration. So, i am not sure what catalog you are looking at but Walker won't be selling me anything.