Wilwood Ultralite 32 Straight Vane Scalloped Rotor.
Wilwood’s ULS – 32 scalloped iron rotors provide a highly effective lightweight option for sprints, late models, modifieds, and other competition applications that race in low to medium temperature ranges. ULS – 32 Series Scalloped Rotors feature a fully machined scallop configuration that provides the highest degree of weight reduction on a vented straight vane iron rotor. Scallop machining will remove as much as three pounds, or nearly 33% of the rotor mass. The vented castings provide increased cooling capacity over machined steel plate rotors, with improved structural durability over drilled rotor designs.