Hello all, I'm an imposter from the 944 world. Wanted to share a part that I whipped up for a friend on here, for his xDrive E90. My understanding from him is that a good (stiffer) aftermarket part isn't available, except for a solid unit which leaves a lot to be desired as far as NVH.
This design is a simple insert, made from 95A Shore hardness thermo-polyurethane (TPU):
Here is a video of the bushing, and installation:
I mainly wanted to feel out the interest for a part like this. I'm not necessarily trying to profit from this - I figure that if a 2 or 3 were sold (which would offset my time/materials) then I would be happy to open-source this part are share the files. Just reckoned it would be better than making a one-off part.
If anyone wants to be part of the testing, drop a line. I can ship a few at cost, probably $10 + $8 flat rate USA shipping.