Upgrade your Mazda MX-5 NC's braking performance with the Wilwood Spec-37 GT Slotted 327mm Front Brake Rotor. Designed for extreme motorsport conditions, these rotors are crafted from Spec-37 iron, a premium-grade material renowned for its durability, thermal stability, and resistance to distortion. The 48 curved vane design enhances cooling and heat dissipation, preventing brake fade and extending rotor and pad life. Precision-machined to ensure flatness and parallelism, each rotor features an asymmetrical face slot pattern that reduces harmonics and improves thermal balance, resulting in smoother braking engagement. The black electro-coated finish offers excellent corrosion resistance, while individual dynamic balancing ensures vibration-free performance. Ideal for short tracks and road course competition, these GT slotted rotors deliver unmatched cooling capacity and longevity for extreme braking demands. Features Material Spec-37 Iron Vane Count 48 CV Style GT Slotted Surface Finish Black Electro Coat Bedded No Balanced Yes