Anyone know pipe diameter after the Y on 6.2 exhaust

[Robwcormack]

Hoping someone knows this because it's raining here and I am trying to order a new setup.  I was going to just get an XR1 muffler and get rid of the flappers and resonators, but after hearing a similar truck with just that muffler it's a little louder than what I thought.  Thinking I may be able to move one of the resonators from the back to go in after the muffler which would be fairly similar to what the S Type system looks like.

[Billet Bowtie]

The intermediate pipe the muffler is welded to is 3.5". The tailpipes that have the resonators in them are 2.5". Your best bet might be to cut the flappers and stock muffler out and then install the Borla muffler leaving the factory resonators in the tail pipes.