Opti-Cal is a revolutionary line of 100% newly manufactured calipers for quality-driven customers. The Opti-Cal line is precision engineered to meet or exceed OE performance and durability, covering popular and high replacement rate applications. And, as brand new parts, Opti-Cal calipers don't require a core return, freeing up space on shelves and providing customers a hassle-free purchase.Each Opti-Cal caliper is made with 100% newly manufactured materials, and are either zinc plated steel or aluminum for superior corrosion resistance in the harshest of elements. The surface is finished to closely resemble the OE part to offer unparalleled, enduring style and performance, and the whole caliper is rigorously tested to ensure safe, reliable performance after thousands of miles. These premium friction-ready calipers give you both unparalleled style and performance as well as the freedom to customize the brake pads for each application.With Opti-Cal, we meet and exceed OE design and specifications; we use EPDM70 rubber components for superior heat resistance, performance and durability, silicon boots for heavy-duty applications, and we include pre-lubricated guide pins, brackets, and pad abutment hardware where applicable.