Congrats on the build! I am sure you will love it. It is the same 4.8 DFI engine that I have - different tranny.

As a disclaimer, I am clearly partial. However, with that said, I am pretty objective. Initially, I was kind of concerned that it would be too loud for me. I wanted to avoid an american muscle , straight-pipe V8 sound. I pushed on with the consoling thought that I could also add a couple of resonators after-the-fact to quiet it down some.

After the system was installed, I was a little miffed that the sound is quieter than just having the secondary cat bypass pipes in some regards. I contributed this to a few factors: (A) the x-pipe is known to quiet down dual pipe exhaust systems. It is also placed as far upstream as possible. In the stock system, the air merges in the large factory muffler under the rear bumper. (B) the factory muffler has a raspy note to it. This rasp is amplified when you put on secondary cat bypasses, hence why some people remove them almost immediately (personally, I liked the sound). So with the factory muffler removed, along with most of the rasp, it ended up quieting it down from having just the secondary cat bypass. The exhaust note now is a little bit deeper than raspy (C) the Cayenne has an excellent amount of sound insulation /deadening material. So the sound from the inside went from almost non-exist to a light/med rumble under normal driving conditions- which is what I wanted. Of course, it is louder outside.

Overall, I think it is about 20-30% louder (read: more rumble) inside the cabin. When cruising, off boost, I would challenge a passenger to notice that a full open exhaust was added. That is the beauty of boosted cars, they are not that loud when off boost. WOT is another matter (see my recent vid posted here) So no, I would not hesitate to drive my CTT 1000+ miles - it only really gets loud when I am in the throttle. For example, it is still quiet enough that my wife can peacefully fall asleep in the passenger seat after a night out, so my exhaust system gets her approval.

Cool! Yeah, there is isn't much benefit to what I did from a third person perspective. Sure, I saved about $1K from buying the midsection from SuperSprint - but is it more about gaining skills and learning how to fish for me.

I am sure you will love the full titanium exhaust! Put up a sound clip!

 

That's awesome! Thanks for such a detail reply.. I still gotta re-read it to understand it all especially the part where you said it was quieter than just having secondary cat bypass pipes haha.. well the fact that your wife could fall asleep I believe is the perfect answer..!

I tried looking for your vid that you said you posted here.. was it in this thread or somewhere on this forum? Opps nevermind.. just saw it heh.. didn't know that was your vid =X..

If you don't mind me asking.. where are you located? If your near by I would love to check your CTT out! Actually hell if your within any major airports I can fly for free ...

Larry

 

Cool - PM sent.

 

subscribed too, but I cant find the dang video

 

Ask and you shall receive....

Is this the video you are looking for?

VIDEO [HD 1080P]: Short Film - Wicked Cayenne Turbo

 

Just got a TIG welder and have practicing a little lately (besides stress tests)... Looks like I might be upgrading my exhaust sooner than I expected. Look out for this thread, part 2

 

Stack those nickels!

 

Now.. THAT is wicked!!! Welding is one thing I have yet to learn.. it will happen... xD... Post more pics on anything u do! It's like.. car ****.. haha..

Larry

 

Hahaha! Glad you guys enjoy it too! I am definitely excited to mark off another checkbox on my skills list ... TIG welding ..Check!

Now I just have to have a good excuse to cut and weld more stuff...

 

Kent, this is awesome!

Wish i were in the same state as you.

 

Same here! Now lets get you a lifted pepper for the winter season! I am sure you will catch many bro-trucks off guard!

 

In case that last TIG image was not clear to anyone, that was the net result of a stress test. Repeated blows from a 5 lb hammer, then I lined up the seam on my 8 in vice and tightened it almost as tight as I could. No visual signs of stress from the weld joint. I was very very pleased with the outcome.

 

Haha! Yeah, waiting on my wheels to get back from the Powder Coater. Tires are already here and ready to go on.

 

Sweet Dog Biscuits! I just watched the video of the back road.....Save me Jebus.

 

I would like to ask if there is any data for what max power is using stock downpipes with Primary cats + Secondary replaced by a straight pipe.
I am installing hybrid mamba turbochargers (turbine side with 9 instead of 12 blades; 20+T compressor side - 4961).