mymac

How is the engine exhaust sound transferred/ enhanced into the cabin? Not sure what it's called, or how it works??

Jim M.

It's called a symposer. It is a tube from the inlet tubing that attaches to a diaphram (to avoid the smell of fumes) then to another tube that terminates in the back bulkhead just below the rear window. If you pull the carpeted panel just below the rear window you can see the tube where it inters the cabin. Unlike BMW where they pipe false sound through the cars speakers the Porsche unit is real engine sounds.

Needsdecaf

https://www.caranddriver.com/feature...ined-tech-dept

Good explanation and diagram in the link above.

Class5Kayaker

Pulled these two pics from my Serpentine Belt DIY. It's the tube on the left in both pics with orange circles

saundebn

Is this on all 991.2 that have Sport mode or do you need to have the Sport Exhaust option?

Class5Kayaker

Mine is base 991.1. No PSE. Only has sport mode

mymac

Thanks for all the timely replies! I had known that about my 135i, which I thought was pretty lame, but wasn't sure about the P cars. Mine is a 1012.5 CS with the PDk and PDCCw/ PASM, Would the cabin be quieter with the "symposer" disconnected??

LexVan

When your tires wear down, they drown out the symposer.

Class5Kayaker

Yes. There are some hacks out there to make it quieter with a ping pong ball or spray can top in the symposer tube and foam on the baffles (or whatever they're called) on the top of the air box if that's what you're trying to do (most of us want more noise...lol)

This video is for taking off the rear bumper but the guy then removes all his "quieting" hacks.

TTFLT6

Rapter

I would be interested in making the noise pipe more effective and louder.