Posted this on jeepkj also...
Just got done replacing the right rear caliper and ran into a problem. I upgraded to Napa metal piston calipers just to find out that the brake pads no longer clip in the piston. Anyone else have this problem? I managed to bend the tabs out so the brake pad will stay somewhat centered, so I'm hoping it will hold up for the long term.
Anyone see a problem?
Napa Phenolic piston caliper:

Napa Metal piston caliper:

Here are the clips on the brake pad I am talking about:

Notice the inner diameter difference of the pistons? Just thought I'd let everyone know since I couldn't find anyone having this problem.
If anyone knows what size brake pad would clip in the metal piston, I would appreciate it.