Im really interested in knowing this. I’m planning on getting a solid one piece carbon fiber driveshaft.

I considered CF drive shaft for my modded C63 to the point of actually sending money to the company that was going to make them for my group buy on a different forum. Then I backed out and got a refund. The 1-2 lb weight savings wasn’t worth it to me for spending upwards of $2,000. I was expecting at least a 3rd of the OEM drive shaft weight reduction. But literally 1-2 lbs was all some guys were reporting as the orders started arriving to our group buyers door steps.

How did you confirm the weight difference? Our stock shaft is steel I thought, so I would think the weight difference would be substantial.

It’s been a while, but please read through the messages in the AMG forum I belong to. Link is provided here in my post. https://mbworld.org/forums/c63-amg-w...veshaft-6.html

Some respected forum members loved the drive shaft, but it wasn’t because of weight savings.

Idk how AMG driveshafts relate this. This is ISF forum and a thread for an ISF driveshaft. This right here is very important and has me wondering if putting a one piece driveshaft would be a good idea in our cars. I just wonder if anyone would know for certain. For those who wonder about weight savings whether it’s a lot or a little you’ll notice it but also feel a difference from it being one piece vs two.

I believe the gentleman was asking if there are any significant weight savings by going with a CF drive shaft vs the OEM shaft?

From my experience with high torque cars the weight saving is not why owners go with CF driveshafts, at least that is the consensus over in the AMG forums. C63 owners are doing it for various other reasons, but weight advantages isn’t one of them.

I have CF driveshaft from DSS (left) installed on my Cayenne GTS.

Getting the CF driveshaft is NOT about getting lighter driveshaft, it is about getting one-piece unit, which is better in every way, except $$$ cost.
You can get one also made from aluminium, about 40 % cheaper, they are made slightly thicker (due to aluminium not being as strong as CF) but those unit have been reported to be sometimes noisy.
Knowing my luck, I would have got one of those :-))) So, I did not wanted to take a chance, so I chose the best option available, love it every day.
Details: https://rennlist.com/forums/cayenne-...n-957-gts.html

One-piece Drive-shafts
==> You will get more direct feel, more power as there is no interference, as you don't run your driveshaft through the connecting bearing. So your tranny (on Cayenne: transfer case) connects via driveshaft freely and directly to your diff.
==> Also the rubbed disk “guibo” you can see on the top of the OEM unit (right) is gone, again more direct connection. Please note, there is still rubber dampening (black stripes by the mounting points) so there is no unwanted vibration or hasness to your tranny or diff.

The real reason I chose to get mine for the Porsche was, the drive-shaft support was shot, which is notorious problem on Porsche Cayennes/Audi Q7/VW Touareg SUVs, you have to get a new driveshaft or have it rebuild and re-balanced every 60-90K miles.
I was not going to have any of that and upgraded. One-piece unit eliminates those future problems, plus it makes the my manual tranny 6-SPEED V8 just so much fun to drive. I put about 8K on the new driveshaft, no regrets, just a blast as it is so smooth.

WOULD I GET ONE FOR ISF?
- for about $1400, only if there was something wrong with the OEM unit, then definitely.

You spent 8k on a shaft?

Driven 8K miles

So the CF driveshaft is damped as well? Just worrying since the ISF torque converter fully locks and just wonder what kinds of long term ill effects it will have.

Seems like a great design, there is rubber there, I can confirm. I haven’t heard anything about potentially negative long term problems. DSS sells for many platforms, I am sure if there would be anything substantial to worry about, you should be able to dig it up. I am happy with mine.