IMS Replacement

[Jedi]

I have a 2004 Boxster S with 25,000 miles on it (purchased new)

I've been thinking of having the IMS bearing replaced also in need of a right rear wheel bearing. I got a quote of 8.5 hours for the IMS and another 3.0 hours for the rear wheel bearing. Just wondering if these times are reasonable or not?

I haven't been following these IMS issues lately and wondering what kits are available, I think the one they quoted is an LN Engineering ceramic double row.

They also quoted doing an oil change and replacing the rear main seal, is this necessary or might as well do it while they are in there?

Thanks in advance for any advice
Jim