1-Piece Aluminum Caliper with Aluminum Pistons

The calipers are constructed from a solid billet of 1-piece aircraft-grade aluminum, offering exceptional light weight, unparalleled strength, and corrosion resistance. They house aluminum pistons, which provide superior heat resistance and reliable operation. The opposed-piston caliper design is crucial for improving pad grip and minimizing uneven pad wear. Each kit includes 2-piece rotors with vented, drilled cast iron construction and an aluminum center. This design reduces rotational mass, leading to quicker braking response and shorter stopping distances. The 2-piece rotor construction also mitigates the risk of warping by allowing for less restricted expansion and contraction of the outer iron section. Complementing the braking system are stainless steel brake lines that prevent expansion under high temperatures and pressures, ensuring a more immediate and consistent pedal response. This ProComp Big Brake Kit is specifically designed to fit the 2015-2018 Subaru WRX. It requires a minimum wheel diameter of 17 inches (432mm) and features 330mm (13-inch) rotors. The kit includes all necessary mounting components and hardware, such as reinforced carbon steel caliper brackets that allow direct bolt-on installation to existing OEM mounting points.