Unusual exhaust setup? Would this work?

[Houseopayne]

Ok, so I bought a single in 3" single out 3" centered Spintech 6000 muffler. It's on my 2016 Silverado crew cab 5.3. Everything is 3" pipe and single into the same stock location behind the rear wheel on the passenger side.

 

My questions is this:

 

If I decide to go dual exhaust is it possible to put a Y-pipe that is 3" to dual 2.5" right after the outlet to create duals?

 

Has anyone ever done something like this or have insight they can share on why I shouldn't do this?

 

I don't want to have to buy another muffler because I'm a cheap bastard. Thanks in advance for you helping a newbie.

[Waaazooo]

You can. I think the borla duals are 3" then Y's to dual 2.75 o.d. Then exits with 4"

 

 

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[bdbake01]

Basically what I did except I removed the stock muff and relocated the factory resonator and flapper valve to the same location, then split into dual 2".