I painted them last weekend with some caliper paint. There are 2 parts to the brake, the caliper and the caliper mount. The caliper is the part that has the piston(s) and the mount is where the brake pads ride on. Well between last weekend and yesterday i messed up which caliper mount is right and which is left. The calipers have a (R) and a (L) but the mounts don't. The mounts look identical to one another in every form. Every number is the same on them except for one. On one mount there is a large 2 and the other has a large 4 on it. Can someone please tell me if there are side interchange.