4-Piston Big Brake Kit with 2-Piece Rotors

By replacing factory components with race-inspired hardware, this kit enhances braking modulation, thermal resistance, and overall reliability during extended track sessions, while retaining the OEM electronic parking brake function. The system is anchored by billet 6061-T6 aluminum PA025 4-piston calipers, which are finished with either a Mil-Spec hard coat anodized or electroless nickel plated coating for extreme heat and corrosion resistance. These calipers utilize titanium nitride-coated pistons and internal dust seals to ensure smooth travel and protection against track contaminants. A T-Bobbin mounting system allows for thermal expansion while minimizing vibrations. Compatibility is specific to the 2020+ Toyota GR Yaris (GXPA16) and 2023+ Toyota GR Corolla (E210). Please note that this kit is custom-packaged to order and is non-returnable due to wheel fitment issues. Users must verify clearance using the provided fitment templates, as the 355mm kit typically requires 18-inch or larger wheels. Professional installation is recommended, and the system includes Goodridge DOT-approved stainless steel braided lines for a firmer pedal feel.