CruiseLifeB
OBS Enthusiast
I’ll trying to find a shop and see what they measure. I’ve been keeping everything ac delco professional or an oem equivalent. Summit racing had some ac delco for like 40 I thinkMeasure, and see.
I would be very reluctant to toss otherwise-usable OEM (?) rotors in favor of the current crop of Chinese knockoffs. Even "experienced" Chinese rotors IN GOOD CONDITION are more trustworthy than new Chinese rotors--the used ones have already been heat-cycled a bazillion times and are therefore less-likely to warp.
But the used rotors have to be de-rusted particularly on the mounting surfaces.
Check out this page from Summit Racing https://www.summitracing.com/parts/ado-18a258ac