What headache level am I looking at for a heat exchanger install?

[MikePVBW]

Hey everyone, I have an LMP heat exchanger and expansion tank for my 5BW on the way. I'm good on bumper removal and all that. Anyone have any experience or tips on what I need to be on the lookout for? Nothing I hate more is pulling more stuff off than I need to. In general, what needs to be pulled off (besides bumper) to swap them out?

Thanks!

 

[OldGoat]

I've been eyeing those, I/we expect a fully detailed write up with plenty of photos. Good luck to you on the install