Delkevic mufflers on stock catalytic converter?

[TheFleshRocket]

Has anyone used the Delkevic mufflers on the stock catalytic converter or stock-sized x-pipe? I'm looking at a kit like this one: https://delkevic.com/ss70-9-stainless-steel-oval-muffler-to-fit-v-max-1700-2009-2019/

But the thing is, I already have an Optimal Carbone x-pipe with the corresponding Guru tune, so I don't want to use the Delkevic cat-delete pipes, I just want the mufflers. The inside diameter of the Delkevic mufflers is 2" but the outlet of the x-pipe is ~1.75". I think if I move the gaskets from my stock mufflers to the Delkevics, it'll fit well but figured I'd ask here first before just trying it.

 

[Itgoes]

I have a friend that used Delkevics with an X-Pipe. Sounded great.
He needed an adapter though to make up the diameter difference. U don't know what size the mufflers were though..... maybe they were bigger than 2"?
He has some.videos on YouTube, I'll try to find them.

 

[Itgoes]

Here is one.

Another.

 

[TheFleshRocket]

Thanks for the vids. Any line on where the adapter pipes came from?