High Flow Cats- X-pipe vs Separate Pipes in terms of noise?

[StreetDragster]

Hi all,
Regarding high flow cats on NA Porsches, I notice that for my 997.1 C2S there is a number of different options, seemingly split in pipework design.
One design is higher flowing cats on stock (separate) pipe designs, with each bank of 3 cylinders separate.


The other design of an X-pipe, where each bank is connected together in the middle


How do these two designs effect things in terms of sound? I'm not really interested in any power increases.
(I have the Gundo hack BTW)
Thanks in advance
Matt

[IknowJoseph]

On the x-pipe is there any gas flow between the two banks? I'd presumed not - they were just two pipes that physically touched in the middle but didn't conjoin at all. I've read that the x-pipes make a preferable sound, but haven't experienced this first hand.

[StreetDragster]

I think they are plumbed together in the x pipe configurations, no idea why though or whether it's preferential or not

Matt

[arcticGT]

I've changed from 100 cell standard lay out to 100 cell X design (both Cargraphic) and there's no difference in sound at all.

[StreetDragster]

Thanks for all your replies chaps, if there is no obvious benefit I'll just get the cheaper one.

Many thanks
Matt