Hi there, does anyone have any experience with a fabspeed maxflow secondary mufflers installed into their 991? How does it sound? Any power increase felt? I installed the fabspeed primary muffler bypass xpipe on my 991 c2s (non pse) and did find the car to be more responsive and does seem to breathe more freely, but find the sound to be somewhat high pitched and not throaty enuf. Considering the maxflo secondary mufflers next but cannot find anything online to hear the sound of just the fabspeed secondary mufflers.

 

Would you have a video clip with your Maxflow X-pipe?

 

Hello, here is a very detailed video hy Fabspeed for their primary muffler bypass xpipe:

 

Hi,

The secondary Maxflo Mufflers will produce about 5hp to the wheels in the higher rpm range on a bone stock PSE car. When used in conjunction with the Fabspeed Primary Muffler Bypass/X-pipe, we see big gains from the mid range on, and we have had a lot of positive feedback on the sound from 991 S owners.

Here is the dyno chart for the setup you are asking about:

 

Thanks for the dyno chart Chris and see the power gains, but would really like to hear what the C2S will sound like with this set up. Can you guys do a video on just the Xpipe + Maxflo secondary keeping everything else stock?

 

It will sound very similar to this - this video showcases our full package with the sport headers.

 

Thanks Chris. Yes I did see that one, but that one I believe has full blown Fabspeed everything including intake, headers, and cat, so I don't think it would sound quite the same.