The disk from the 997.1RS setup could be installed both ways, the updated 4.0/ gt2rs disk can only be installed one way ...

 

I think a lot of people here may be confusing the issue and may actually have the older RS disc instead of the 4.0. The older RS (with blue springs) was noticeably louder. The 4.0 has the marking "gertiebeseite" (gearbox side) clearly marked on it and has a pronounced neck on it which fits into the flywheel. I would not think it could be installed backwards. The older disc did not have this neck and could likely be flipped. I'm thinking that's what LOOK has.

 

Here .... On a 764 plate ... Pressure plate is broken but this is to show this disk (4.0) only fits one way around ...

 

It is my understanding that 4.0 disc PN is 997-116-013-91-OEM.

 

OK, after reading the responses it seems this setup is a bit noisy in neutral with the clutch released. It feels great and makes me wish I never got that ClutchMasters FX350 which was awful. Everyone who drove the car told me it was the worst feeling clutch they had ever driven.
It was nearly impossible to launch the car.
I made the post after listening to it in my garage for the first time which really amplifies the level of sound compared to outside. This probably colored my impression considerably.
If you're going with this setup, expect a little chatter, but also expect to be impressed with the near perfect clutch feel.

 

Any merit to this "window welding" on the 997 mount? From what I can tell, the 997 is far superior than the 996 so why mess with it if it work is my thinking.
https://www.6speedonline.com/forums/...ml#post4510725

 

the 997 is doesnt have the windows that the 996 unit has. so it wont get as much benefit from the window weld since it has almost no were to meld into. its more along the lines of making a broken 996 mount more like a 997 mount for pennies on the dollar. of course if the 996 window weld isnt to your liking you can always buy the 997 mount for a few hundred $$. fwiw i run the 996 mount with window weld. 3 yrs and still going. total cost was 20$

 

I wouldn't mess with the 997 mount. Just install and go. Same mount is used on the 997GT2RS/GT3RS4.0.

 

What's the maximum tourqe which this combination (764pplate/4.0disc)
Can hold??

 

I would not window weld your mount.

On another note, I window welded my factory 996 mount before it failed. I scuffed and cleaned the existing rubber and added window weld over the existing rubber. Fast forward to engine removal for a clutch jib and coolant pinning and as soon as the belly pans were removed two transmission sized chunks of window weld fall to the shop floor. The window weld did not adhere well enough to stay. The other sides came off as well when the mount was removed off the transmission.

 

window weld on my 996tt mount 3 yrs ago still solid as a rock. if the area isnt prepped properly it wont adhere. done right its better than new

 

We'll see after 4-5 years.

 

after 3 yrs its more than paid for itself at 20$. if it lasts another 2-3 yrs its just a bonus as it would be considered a wear item and not expected to last forever

 

I am not saying it isn't worth it for the 3 years and $20. Just saying it is not an alternative to a new mount and will come loose. I think the issue is using window weld over the existing rubber. I properly prepared the mount prior to.