Most likely.
You might be able to inspect and reuse the bump stop and dust cover, but I would plan to replace the mounts.
They have seen a quarter of a million miles, this would likely be the only time you would have to do this and they are tired.
Fairly certain that after 30+ years you're going to have to find a transmission, not sure you could have found that part 10-15 years ago even. Not sure where you are, but I have a rebuilt Phase 1 4EAT w/ 60k miles on it chilling in my garage.
My spare set of Cusco brackets are 4.8mm.
I would keep an eye on the 2mm; it might be fine, but there might be a good reason the others are near 5mm thick.
Someone updated the Wikipedia article on April 11 to mention an internal email stating that 2025MY will be the last for the Legacy.
https://en.wikipedia.org/wiki/Subaru_Legacy
I have a set of stock injectors, but they are the side-feed style from 05-06, you need the top-feed style.
There should be folks on here with spare stock top-feed injectors.
You would need to convert the .heic to .jpg.
Apple has a great format that can basically store mini videos, but it's not a good format for viewing on the web.
I mean, there is a reason why I don't have one... hahaha
I'll probably fab up something similar with the welder this summer if I get a break from work and feel like welding in 90-degree weather.
You just have to cut the corners of the front crash bar to fit a pre-facelift JDM bumper. I have a post from ~2019 with a picture of how much in the "what did you do to your 4th gen" that I'll try to find.
Yes, if you are super careful you can get close to what it was (sharpie on the bolts); but I wouldn't drive a long time without getting a proper alignment.
Did you see these?
https://get-primitive.com/product/struts-shocks/kyb-struts-and-shocks/kyb-excel-ggr-2-2000-2004-legacy/
https://www.summitracing.com/search/brand/kyb-shocks-struts/part-type/shocks-and-struts/year/2001/make/subaru/model/legacy
There is a front set on Amazon:
https://www.amazon.com/KYB-334273-Excel-G-Gas-Strut/dp/B000C40RWK
https://www.amazon.com/KYB-334274-Excel-G-Gas-Strut/dp/B000C3ZCLW
Rears on Amazon:
https://www.amazon.com/KYB-341275-Excel-G-Gas-Strut/dp/B000C40S42/
Hopefully that helps.