Essex Designed Pad Tension Blocks are precision machined from billet aluminum, hard anodized, and topped with a heat-treated stainless steel spring. These blocks install in place of the original pad retention blocks in AP Racing's CP9660 and CP9661 caliper. They place a small amount of tension on the top of the pad, substantially decreasing its movement inside the caliper. Included in each Pad Tension Kit are two pad tension blocks, which is enough for one AP Racing CP9660 or CP9661 caliper. If you need enough tension blocks for both of your calipers, you need to order two of these kits.

When installed, the spring clip on top should sit closest to the outside of the caliper (as shown in the pics below).

Hard anodized billet aluminum block, fitted with heat-treated stainless steel spring. When installed, the spring clip on top should sit closest to the outside of the caliper.