Wilwood ULHD 16 curved-vane rotor, Spec-37 iron, 11.75-inch diameter — left-hand side — is the matching left-side replacement with the same curved-vane cooling design. The Spec-37 iron construction and 11.75-inch diameter match the ULHD rotor specification for installations requiring the left-hand rotor in this rotor set.
Wilwood ULHD 16 Curved Vane Rotor - Spec-37 Iron 11.75in Rotor Diameter - Left Hand Side