I don't have a lot of miles on my LN IMS bearing (less than 1k) but I can attest to its very high quality of construction. Comparing to the original bearing the LN part is significantly beefier and turns smoother. At 83k my original bearing showed no outward signs of trouble. When I removed it and popped off one of the seals a lot of cooked smelling oil gushed out which I believe is a bad sign. Because I could do all the clutch and RMS seal work myself the added cost was about $600 to put in the better IMS bearing. That isn't an extravagant amount of money when you consider a set of tires will cost much more than that typically. FWIW this was the first time I've ever replaced a clutch on any car and overall the whole things was pretty easy. I like DIY though and enjoy working on cars.
Steve
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