Sport cats with optional header would be good option for you.
I had 991.1 S before and installed Fabspeed headers and it was about 10% louder than before (stock PSE).

 

Or start drilling holes in the muffler!

 

To MY ears and taste, allot of these exhaust produce raspy sound. Only 2 ~7k exhaust systems sound good to my ears.
When i got my AWE Xpipe, i liked the increase in volume but raspiness was too much for my taste. I began looking for alternatives. I was going to do custom resonators on the Xpipe but managed to ****** a pair of Fister mufflers for dirt cheap and decided to try.
Just last week i added those to the Xpipe. the sound deepened allot. But at throttle it sounds like a modified lambo. very loud, BUT no drone and allot less rasp, fantastic backfire

I think that if you keep the stock center muffler, your best bet is Fister. much deeper note than stock, no drone and a tad louder than stock. Very close to PSE and in my opinion a tad better sounding based on videos i've seen of adding just fisters

 

I like the "Side-skirts" (don't know if it is the correct word) on your 991. Was that a factory option, OEM or after market?
Are they painted in blue as well? Thank you great sound!

 

Did you replace the Stock Headers with Soul, does that include the cats, are they built in?

 

Any particular brand??

 

Thanks!

 

Thanks!
@Schorsch They are factory, standard on Carrera 4 I believe. There was an option to paint if I recall, but mine are standard black.

 

Thank you for the info! They do look awesome!

 

Is there anything I can do with the Fabspeed muffler bypass? I have it installed on my C2S and it just isn't doing it for me. My C2S did not come equipped with PSE.