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Product details
This GT rotor pairs a slotted Spec-37 friction ring with the eight-point threaded mounting pattern. Its right-hand 48-vane core and 12.72-inch diameter suit the specified 1.25-inch brake assembly, while the 7.62-inch attachment circle prevents confusion with the smaller bolt flange. Founded by Bill Wood in 1977, Wilwood designs and manufactures disc brake systems in Camarillo, California. Its range includes calipers, rotors, master cylinders, valves, fittings and lines for motorsport, street performance and specialized applications. Rotor choice belongs within that complete system: the caliper, pad, mounting hardware and intended duty must work together.
Technical Details
- Manufacturer part number: 160-2978
- Quantity: One rotor; not an axle pair
- Outside diameter: 12.72 inches
- Nominal thickness: 1.25 inches
- Rotor material: Spec-37 Iron
- Construction: 48 curved vanes
- Friction surface: GT Slotted
- Finish: Plain
- Approximate weight: 13.00 lb
- Factory burnished: No
- Dynamically balanced: Yes
- Installation orientation: Right-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: 8.88 inches
- Opposite-hand companion rotor: 160-2979 (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
Check all eight 5/16-24 threads and the 7.13-inch center register. Confirm the hat geometry and right-side vane orientation before installation.
Wilwood product specifications · Rotor dimension diagram
PMB Performance brings more than 20 years of brake expertise to component selection. Contact us with your existing rotor and brake-package details if you need help checking the match.
