Upgrade your Mazda MX-5 NC with the Wilwood Front Brake Rotor Hat, designed for the GT Series Big Brake system. These Flared Bell hats are precision-machined from premium aluminium alloys, offering high strength and reduced weight. Featuring threaded rotor mount holes, they are compatible with standard through-hole mount rotors and can also be used with T-Nuts or bobbins for specially machined slotted hole dynamic mount rotors. Engineered for rotor mount bolt circles of 8.38" and larger, these hats, when paired with Wilwood rotor hardware kits, deliver solid, reliable performance in the most demanding conditions.