The drilled holes will reduce the heat that builds on the rotor.
•New in Box, Ready to Install, No Modifications Required.•Engineered with premium G3000/G11H18 iron castings for strength, stability, and durability.Formulated with the G3000/G11H18 cast iron specification, DFC G3000/G11H18 Brake rotors are engineered to match OEM specifications for durability, reliability, and stability.