Essex Designed Pad Tension Kit for AP Racing CP9668/CP9669 Caliper PairThe Essex Designed Pad Tension Kit for the AP Racing CP9668 & CP9669 caliper series substantially reduces pad movement inside the caliper. Each caliper requires one Pad Tension Kit. This is for 2 kits. 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 CP9668 or CP9669