Essex Designed Pad Tension Kit for AP Racing CP9440/9441/9449/9450/9451 CaliperOne pair of pad tension blocks for one AP Racing CP9440, 9441, 9449, 9450, or 9451 caliper. Substantially reduces pad movement inside the caliper. Each caliper requires one Pad Tension Kit. If you need enough tension blocks for both of your calipers, you need to order two of these 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