Finally got arouond to installing the RSS/IPD Cayenne Turbo Plenum today!
Subjectively feels quicker - a full 30HP @ the wheels quicker - not sure, but the a$$ dyno says .

I have a photo on the bottom of the page on my link here below
http://web.mac.com/kooser/iWeb/Koose...e%20Turbo.html

Design makes for better directional flow. The left and right split openings are slightly bigger too (sorry but I don't have measurements).

Even prior to a new Dyno run I can now strongly recommend this quick mod.

 

any difference in sound? Anyone know if this will fit a 4.8 Turbo engine?

 

Koos, how do you like the Cargraphic exhaust? You have done a few things that I would like to get done. Thanks for posting about the intake plenum, looks to be a good mod!! BTW, you CTT is awesome....

 

cargraphic exhaust got vetoed by the commander in chief

 

Thanks BTW.

As far as the exhaust, I loved it, Note the past tense here
It was too loud for my wife's liking and I wound up removing it and putting the stock one back on.

I haven't got around to pulling it off my page. I may keep it on their for nostalgia sake

There is no change in sound, but perhaps auscultation with a stethoscope would be in order.

Changes in sound will come from intakes, cat bypass pipes and exhaust changes.

 

Do you still have the CG exhaust? If so would you be willing to part with it in exchange for some funny looking guys on green paper?

 

will this fit an 08 TT?

 

Although I was looking under the hood of one yesterday when I was having my plenum installed I really didn't think to check to see if this y-pipe would be a direct bolt on like on the 03-06s. Only way to know for sure is to give the dealer a call and have them compare under the hood.

If I may suggest that diverter valves, bypass pipes, exhaust, and air intakes might be the first choices i would make and should all fit exactly.