The Wilwood 160-4766 is a 12.90-inch steel brake rotor, 0.38 inch thick, with a drilled friction surface and a black electro-coat finish. The manufacturer lists it as a solid-construction, non-direct mount design, so it rides on a separate hat rather than bolting straight to the hub. Its listed weight of 5.70 pounds keeps unsprung mass low on a dedicated track, drag, or lightweight race build, and the steel construction gives you a Wilwood-engineered alternative to the stock iron rotor on a performance front axle. Searches for a 12.90 steel drilled front rotor and a Wilwood 12 on 8.75 hat-mount rotor point to this part.
Choose this rotor over a stock or generic replacement when you are building a hat-based front brake system that needs a precise center bore, bolt circle, and rotor diameter. Because the rotor is a non-direct mount, its fit depends on your hat and caliper, not just the vehicle year and model. Owners on user forums have reported that a hub with a different hat or axle interface can leave the rotor sitting off-center in the caliper, so measure your hub and confirm the setup before you order. Confirm street suitability and caliper compatibility with the manufacturer before installing it on a daily driver.
The manufacturer lists this rotor's style as drilled. Check the pattern against your build plan before ordering if you were expecting slots.
Owners on user forums report torquing the hat bolts to 25 lb-ft per Wilwood's instructions, using red threadlock. Some owners also add safety wire, because bolts can loosen under heat cycling. Follow the manufacturer's current assembly instructions.
The manufacturer does not confirm caliper compatibility for this part in the information reviewed. Verify caliper and hat fitment with the manufacturer before installation.
This is a two-piece rotor and hat installation, so plan for a few extra steps beyond a one-piece swap. Use 12-point sockets for the hat bolts, and clean and chase the threaded holes before reassembly. Owners on user forums report that bolts backed out after a few heat cycles when they used a threadlock rated only to about 300°F, so use a high-temperature threadlock and safety wire the hat. Check rotor centering in the caliper before you fully tighten the caliper bolts, and bed in the pads once the system is installed.
