The Wilwood 160-5843 is a 12.19-inch vented iron brake rotor from the Ultralite HP 32 line, measuring 0.810 inch thick with an 8 x 7.00-inch bolt circle. Wilwood casts its UL rotors from a long-grain carbon iron, chosen for durability and resistance to warping under heat. The HP version adds close-tolerance machining and smooth turned pad faces, and the additional mass of the HP series extends service life on heavier competition vehicles and other severe duty applications.
Compared with a stock rotor or a budget blank, this part's case rests on heat handling and rotating weight. The 32 straight vanes aim to balance cooling against low mass, and the manufacturer points the UL line toward hard braking dirt tracks or rear axle service on pavement cars. A vehicle application list was not confirmed in the manufacturer's documentation, so verify hub compatibility before ordering.
Because the 8 x 7.00 bolt pattern is the critical fit point, measure your hub's lug layout before buying this sprint car, midget, or rear-axle brake rotor. The manufacturer's install sheet was not located during research, so confirm hardware, hat requirements, and bedding procedure with Wilwood before installation. Search terms this part matches: Wilwood 160-5843, Ultralite HP 32 vane rotor, 12.19 x .810 vented iron rotor, 8 on 7 bolt pattern, straight vane iron brake rotor.
The manufacturer states that HP rotors are close-tolerance machined with smooth turned pad faces, and that the HP series' added mass extends service life under heavier competition and severe-duty use. The manufacturer also describes the HP series as a base model for everyday use.
This could not be confirmed from the manufacturer's documentation found during research. Confirm with the manufacturer before ordering if you need a rotor-and-hat assembly.
