I've never had a problem with them. Then again in AZ it doesn't get rusty. When I have some extra money, I am gettind DS from R1.
Sorry about the spelling, lol, ment to put brake (I suck at spelling)
I think stock is like 10.8 or something like that.
I am very impressed with the Duralast Cmax, they are extremely quiet.
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-Mike H.