Looks like I swapped them out for the stiffer OE RTABS (Z4M spec) and limiters in Nov 2018, 11k miles ago. Funny enough it was shortly after a track day where I was like "don't need no LSD this shit is planted." The crashing, albeit like one in every 15 impacts, was driving me crazy on the street and made me change back to rubber, but I've been thinking about that planted rear end for 2 years since. I just finished really locking down the whole rear -- subframe mount to chassis rail brackets, RACP X-brace, solid subframe bushings, even a helical LSD and guess what? Rear end still feels fucking sloppy.
I bought some Bimmerworld RTABearings while they were on sale and am going to try them out, but I don't suspect they'll be any different from the Moog's other than easier to install.
Now you know I'm not one to compromise on NVH
(I'ma lil bitch boy), but I think the RTABearings are actually worth it.
As a test, I filled the body cavity around the left RTAB pocket with expanding pillar foam. We'll see if that dampens the crashing or if I grew a pair since 2018.
Quoting myself to update this post too. I installed
ECS's bronze caliper bushings the other day and it finally gave me the firm pedal that I'd been chasing. Pro tip: rebuild your own calipers instead of buying some shit rebuilds from Centric (or anyone else). They use the cheapest, softest excuses for rubber guides that I've ever seen and it had me thinking there was air in my lines and needlessly flushing expensive fluid through them for the past year.