I did my front 11x3s recently. I found out most of the manufacturers used the same part. The thing to check for is what the MAX size is imprinted on the drum. Nearly all of them I spec'd out were already at max size right out of the box so there was no room for wear. After doing some checking I found that Raybestos 1938R still had the correct specs and Napa also had them as well; however, Napa shipped me only 1 of the 2 I ordered and it was damaged. I did this around 6 months ago so I don't know if the info still holds true and again it was for the 11x3s. If you do want an unused pair of the ones I found that were already at max, I'll sell them cheap.