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US Spec Exhaust Sound

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Old Sep 20, 2019 | 10:19 PM
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Default US Spec Exhaust Sound

Here's a quick video my 992 4S (US car without exhaust particulate filters). First is without PSE and second with valves on. I believe the max revs are 4K when the car is parked and cold (hence hitting the limiter).
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Old Sep 20, 2019 | 10:38 PM
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my subwoofer was rumbling
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Old Sep 21, 2019 | 01:18 AM
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Last edited by Michael Smith; Sep 21, 2019 at 06:45 PM.
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Old Oct 8, 2019 | 09:38 AM
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This sounds significantly better and louder than the EU exhausts.
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Old Oct 8, 2019 | 10:08 AM
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Originally Posted by Pegg
Here's a quick video my 992 4S (US car without exhaust particulate filters). First is without PSE and second with valves on. I believe the max revs are 4K when the car is parked and cold (hence hitting the limiter).
I personally like the sound. No it’s not super aggressive but it has a nice character with no droning and some nice burbles and pops. And being a 3.0 liter six I think makes it all the more impressive.
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Old Oct 8, 2019 | 10:16 AM
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The sound outside is somewhat misleading. There’s a bit of a racket inside due to increased in piping sound through the symposer. It can get old quick.

when our good friends at Soul performance come out with a sport cat system, I’ll probably have to take the symposer out or obstruct it a little bit. It’s not about the loudness but about the quality of what’s coming inside the cabin.

for instance, on the 991.2 it was easy to tell if the car was in loud mode with PSE, now not so much. Perhaps a matter of taste.
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Old Oct 8, 2019 | 10:55 AM
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I am very pleased with the noises made by my US Spec 992 PSE. It's downright civil compared to my no muffler Alfa Romeo 4C Spider and other cars that I have had in the stable.
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Old Oct 8, 2019 | 11:40 AM
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Originally Posted by John Mclane
The sound outside is somewhat misleading. There’s a bit of a racket inside due to increased in piping sound through the symposer. It can get old quick.

when our good friends at Soul performance come out with a sport cat system, I’ll probably have to take the symposer out or obstruct it a little bit. It’s not about the loudness but about the quality of what’s coming inside the cabin.

for instance, on the 991.2 it was easy to tell if the car was in loud mode with PSE, now not so much. Perhaps a matter of taste.
What is the "symposer" you are referring to?
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Old Oct 8, 2019 | 12:23 PM
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Originally Posted by kayjh
What is the "symposer" you are referring to?
Google is ready when you are
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Old Oct 8, 2019 | 12:32 PM
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Originally Posted by Pegg
Here's a quick video my 992 4S (US car without exhaust particulate filters). First is without PSE and second with valves on. I believe the max revs are 4K when the car is parked and cold (hence hitting the limiter).
Hi can you show me where is the FAP in european exhaust and the difference with yours?
Thank you
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Old Oct 8, 2019 | 12:48 PM
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Originally Posted by rk-d
Google is ready when you are
Is it a reference to the tube connected to the engine's intake and run to a port in the rear package tray/engine cover in the interior?
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Old Oct 8, 2019 | 01:11 PM
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Hi do you have a pic?
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Old Oct 8, 2019 | 02:44 PM
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actually sounds quite a bit GT2 on the road in the car, which surprised me haha
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Old Oct 8, 2019 | 03:02 PM
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Here is some more US Spec audio...


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Old Oct 8, 2019 | 03:05 PM
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Let me also add that when I test drove the car... the downshifts cause a significant amount of "pop" that I didn't expect in a new "dumbed down" version of the 911 as some would describe it.
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