When rebuilding the rear of my '65 Fastback I found that both rear drums were badly deformed. I got burnouts on the track just from standing on the brakes because I didn't have a cable lock. I guess that upset her. I found them from Centric and they have been working for me for a long time. They work great, but if I plan on keeping the drums in the back of my car I'll probably switch to 2 1/2 inch drums at some point.