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Product details
This left-hand HD rotor retains smooth friction faces on a heavy-wall Spec-37 casting. Its 12.19-inch diameter and 1.25-inch section are paired with eight 5/16-24 threaded mounting points, defining a specific hat or hub connection. A rotor must suit both the mechanical installation and the rest of the braking system. Wilwood brings that system perspective to its calipers, rotors, master cylinders, valves, fittings and lines, designing and manufacturing disc brake systems for motorsport, street performance and specialized applications. Bill Wood founded the Camarillo, California company in 1977.
Technical Details
- Manufacturer part number: 160-3873
- Quantity: One rotor; not an axle pair
- Outside diameter: 12.19 inches
- Nominal thickness: 1.25 inches
- Rotor material: Spec-37 Iron
- Construction: 48 curved vanes
- Friction surface: Plain Face
- Finish: Plain
- Approximate weight: 12.70 lb
- Factory burnished: No
- Dynamically balanced: No
- Installation orientation: Left-hand
- Rotor attachment pattern: 8 x 7.62 inches
- Rotor mounting hole / thread: 5/16-24
- Registration / lug inside diameter: 7.13 inches
- Far-side inside diameter: 8.41 inches
- Opposite-hand companion rotor: 160-3872 (sold separately)
- Intended use and restrictions: Suitable for moderate-temperature racing and street use. Spec-37 heavy-wall castings.
The hat or hub, fasteners, caliper and pads are not included.
Fitment & Compatibility
Confirm the 7.62-inch mounting circle and 7.13-inch register. The HD plain-face configuration is distinct from slotted GT and drilled SRP options, even where mounting dimensions overlap.
Wilwood product specifications · Rotor dimension diagram
With over 20 years of brake experience, PMB Performance can help you compare the installed assembly with this rotor’s dimensions before ordering.
