Wilwood Rotor-UL32 Vented Iron-Drilled 12.19 x .810 - 8 on 7.00inWhen it comes to rotors, racers are constantly searching for the ultimate balance between the lowest weight and the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULD 32 drilled iron rotors provides effective