Okay so just to confirm, 95% of the vibration is gone with the diff bushing inserts removed. Prolonged driving at 86 mph did not produce any, none that could be telegraphed to the cabin anyway.

Anybody on STi bushings with carbon driveshaft?

For those with a one piece driveshaft and MT, can you measure the pinion angle?

I am a happy customer with a Versus carbon driveshaft for automatic transmission. The only suspension modification is the brace for differential. Absolutely no vibration problem at any speed (up to 100 mph). The quicker acceleration from the lower rotational mass is noticeable.

Try tightening the DS bolts that hold the DS to the yoke. Apparently makes a big difference re vibration issues. It's a pain in the arse to get them properly tensioned. Tension the bolt and NOT the nut in this instance. You can also rotate the DS 90 or 180 deg to see it that helps.

Do you have any other mods to the GB or diff mounting. Inserts or replacement bushes for example?

Had no such issues with mine which was delivered and installed in November '21. Having bought a lot of Verus stuff, if they make it then it's 100% right.

One hundred percent correct re the quicker acceleration due to lower rotational mass. I was really surprised how noticeable it was..

I'd heard that before I pulled the trigger on mine. That leaves very few manufacturers. In my experience well worth the effort of changing to one. Pretty sure Verus are seen as by far the best.

I have the STI engine mounts and Whiteline GB upgrade with my CF DS.. I also have the Whiteline subframe inserts.

I also have the IRP shifter to add to the rattle/NVH battle!

I did have the diff inserts but removed them due to NVH. Having said that apparently just installing the rear diff inserts does not result in NVH.

Verus driveshaft discontinued? What to buy?
 

Verus site page for our driveshaft says "*Manual Driveshafts are no longer in production*".
Now what?
I was about to order the PST, over the Driveshaft Shop's, because of weight difference. DSS lists theirs as 25 pounds and PST says 13.9 pounds.
I'm never going to go for huge power so I see no reason not to buy the PST.
FYI, I am road racing and not drag racing.
Thoughts?

No. They list stock as 24.something, I think theirs weighs 12.9. check again :)

I would wonder what the critical speed on the DSS carbon shaft is since the aluminum one is pretty low.

Not sure where your info is coming from, but the response from Verus is that they are discontinued because of the exorbitant cost to make them. They have two for automatics in stock and that's it.

As to wondering what the critical speed (RPM's I assume) on the DSS carbon shaft or saying that the aluminum one is rated as low, I have no idea what dragoontwo is referring to. I've only seen power ratings.

I think you misunderstood, I was only talking about the weight of the DSS driveshaft. Maybe I misunderstood? Haha

Here's some light reading about their aluminum shaft.

https://www.ft86club.com/forums/showthread.php?t=148537