Advice for people who change the LCA bushings from drilled to heavy-duty TT type:
1. None of them withstands more than 30 000 - 40 000 kms of hard road use. If you drive like a granny, they will, but not if the LC/LFR/LCR is driven as it should.
2. They break on the weakest spot in their surface, the place where they flex, halfway between edge and middle bolt.
3. Original drilled bushings broke starting from the edge of the hole and they held in 5-10 mm of rubber at their best. TT bushings broke where the hole should have been and the crack went on, until they also held in maybe 10 mm of rubber.
4. To be safe, change them each third oil change.
5. Companies who make them in good quality and cheap prices: Meyle, Lemförder, Febi, Boge. Audi OEM bushings are Boge. Febi is the cheapest. Hardness (any of them is much harder than OEM drilled) is like that, from softest to hardest: Febi -> Meyle -> Lemförder -> Boge. Differences in hardness are small.
~Nautilus