Loveivs,

Just noticed that you added a 2013 911 GT3 to your signature. Congrats on the preorder! I am watching the 991 GT3's closely. Just want to wait and see what they do with the GT3RS variant on the 991 platform.

 

Just to give you a heads up. I currently have my primary & secondary cargraphic cats on my 08 CTT with the cargraphic sport exhaust and my neighbor ( not primary house) was complaining about the sound. My point is you will not please everyone every time. Lets just say, I have already ordered and received the primary & secondary cat bypass pipes!!

 

A little update:

I think I may disappoint you guys. My local Porsche specialist found me a pair of used secondary catalytic. They charged me nothing except larboring. Now, the exhaust is definitely quieter. I can leave the valve opened all the time. I realize I lose some high-end power, but the low-end torque is definitely comeing back. I can feel it really! As the straight pipe will make extreme noise to the neighbour, the stock secordary catalytic is relatively restritive. High-flow 200 cel cat might be the ideal. but I doubt if any one makes them.

p.s The Porsche specialist tells me that the PSE for 958 can be actually installed on 957 model. They did the "experiment" few month ago. The result is good. The 957 owner loves the new exhaust. . As I'm always a fan of 958 GTS souding. It makes me wanting 958 PSE on my ctt. lol

 

Thanks mate.
A GT3RS is even meaner! Rumor says it will first appear to the public in 2015. GT3 is "daily" oriented, and GT3RS is more "track" oriented

 

Actually this is what I'm running at the moment. 200cell secondary cat
http://www.cargraphic-ms.de/index.ph...,article,6585/

 

Isn't that primary cat?

 

Sure is but the next page is the secondary cat.
http://www.cargraphic-ms.de/index.ph...,6004/&start=3

 

FVD also makes 200 cell secondary cats for our application.
http://www.autoatlanta.com/porsche-p...and-Components

 

Yup I saw them on the cargraphic website. Supersprint also offer high-flow secondary catalytic with similar price. so did you pay 4 grand plus to get the cargraphic primary cat? It's SO expensive for what it is.

 

Speaking about FVD, I am more interested in their intercooler kit.

http://www.fvd.de/us/en/Porsche-0/Ca...8_and_957.html

well, there are making another type of intercooler kit. The shiny one. Co-op with greenmotorsport.

 

For once I did not take the original impact of the cost of modifications, the original owner did but I did get receipts totaling over $150K I actually just purchased the Techart sport exhaust yesterday to see how it will sound different from Cargraphic.

I thought your previous statement that you were in doubt if anyone makes the 200 secondary cats but glad you already know about a few sources.

 

Hopefully someone can benefit from them and report back. Mine were included in the Evoms kit. I'm surprised we don't have more options but the CTT performance upgrade market has been getting bigger lately!