SP Performance S55-178-R Cross Drilled and Slotted Brake Rotor - Rear

The SP Performance S55-178-R is a high-performance cross drilled and slotted brake rotor designed to deliver superior stopping power and enhanced braking efficiency. This rear rotor combines the cooling benefits of cross-drilled holes with the gas-expelling advantages of precision slots to optimize braking performance under demanding conditions.

Key Features:

• Cross drilled holes machined with exclusive sinusoid curve chamfer for maximum cooling and minimized stress
• Directional slots expel brake dust, moisture, and gases away from the braking surface
• Eliminates sharp edges on drilled holes to greatly reduce the chance of cracking
• Machine balanced and disc ground to meet or exceed OEM specifications
• Direct replacement for existing brake rotors with no brake system modifications required
• Available with choice of corrosion-resistant ZRC coating in Gray, Silver, or Black
• Manufactured in the USA by SP Performance employees

The combination of cross-drilled holes and slots provides optimal cooling while keeping the rotor surface clean for premium brake pad contact. The holes maximize air circulation and reduce surface temperature to nearly eliminate heat checking and warping, while the slots combat brake fade and prevent hydroplaning by removing water from braking surfaces. Designed with CAD software and produced on CNC machines to ensure the highest quality and consistent performance.