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Product details
Wilwood’s iron C3 Corvette rear hat has a 6.54-inch parking-shoe bore. Confirm the supplied offset and matching drum-in-hat components. Wilwood Engineering’s work covers the design and manufacture of disc brake systems for motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977 in a business now based in Camarillo, California. Its calipers, master cylinders, brake rotors, brake lines, valves and fittings must be selected around the complete system.
Technical Details
- Manufacturer part number: 170-10621
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 1.600 inch on the product and kit pages; 1.98 inches in DS624/DS625 parts lists. Confirm the supplied dimension and measurement reference with Wilwood.
- Rotor attachment interface: 12 x 8.75 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: 2.81 inches
- Rotor mounting hole/thread designation: 1/4-28
- Parking-shoe bore: 6.54 inches
- Internal clearance diameter: 6.42 inches
- Mounting-face thickness: 0.29 inches
- Hub-side hole clearance diameter(s): 0.450 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-8217; verify the specific rotor and attachment arrangement before ordering hardware
- Component: Parking-Brake Rotor Hat
- Material: Iron
Fitment & Compatibility
Identify the installed brake conversion before choosing this hat for Chevrolet Corvette C3 brake conversions. The offset, center register and attachment hardware must agree with the rotor and hub in that assembly. Wilwood publishes 1.600 inch on the product and kit pages and 1.98 inches in DS624/DS625 parts lists. Confirm the supplied offset and its reference faces; the measurements are not treated as interchangeable. The parking-shoe diameter, anchor arrangement and complete drum-in-hat mechanism must match. A bare hat is not a complete parking-brake assembly.
Manufacturer Reference
Wilwood component specifications and dimensions · Assembly instructions DS625
Contact PMB Performance with the brake-kit identification and measurements for help selecting the part. Our team brings over 20 years of experience.
