As Yeti have not really changed the 575’s geometry for years they will take a 160mm fork quite comfortably. Mine have run Van 36’s for years no probs
I have had to replace parts of my frame through the Yeti warranty. this was before they changed importer. Absolutely awesome every time I have had a problem including rushing me a new rear triangle over a weekend so I could go to the Alps. Expect that partly explains why Yeti have such a dedicated following.
Good luck with they 575 mine is now 6 years old but still takes it like a goodun alps, spain, germany, scotland, wales etc etc.