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Product details
Wilwood's C4 Corvette rear hat combines 0.880-inch offset with a 2.78-inch register. Verify the actual conversion and eight-bolt rotor interface. Bill Wood established Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and builds disc brake systems for motorsport, street-performance and specialized uses, including calipers, rotors, master cylinders, valves, fittings and brake lines. Each part must match the requirements of the whole braking arrangement.
Technical Details
- Manufacturer part number: 170-8493
- Rotor mounting hole/thread designation: 5/16-18
- Internal clearance diameter: 6.00 inches
- Mounting-face thickness: 0.30 inches
- Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-8390; verify the specific rotor and attachment arrangement before ordering hardware
- Component: Short-Offset Brake Rotor Hat
- Material: Aluminum
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 0.880 inch
- Rotor attachment interface: 8 x 7.00 inches; rotor attachment, separate from the hub flange
- Hub-flange mounting/clearance pattern(s): 5 X 4.75 inches; verify the actual hub and wheel-stud clearance
- Center register diameter: 2.78 inches
Fitment & Compatibility
This component belongs to the specified C4 Corvette rear conversion. It is an aluminum rotor-mounting hat with an eight-bolt ring interface, not an iron parking-drum hat. Verify the rear assembly's 0.880-inch offset and 2.78-inch center, along with the required rotor fasteners and caliper location. No separate parking-brake mechanism is included in the component identity.
Manufacturer Reference
Wilwood component specifications and dimensions
PMB Performance can help identify the required brake component with over 20 years of parts experience. Send the kit details and original-part measurements.
