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Product details
A 6.98-inch shoe bore and 1.700-inch offset define this iron Wilwood Corvette rear hat. Match the 1984–1987 conversion's parking components. Bill Wood founded Wilwood Engineering in 1977, and the manufacturer is based in Camarillo, California. Wilwood designs and manufactures disc brake systems alongside calipers, master cylinders, rotors, fittings, brake lines and valves. The motorsport, street-performance and specialized ranges depend on components selected to work within a complete braking system.
Technical Details
- Manufacturer part number: 170-11938
- 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: 3.06 inches
- Rotor mounting hole/thread designation: 1/4-28
- Parking-shoe bore: 6.98 inches
- Internal clearance diameter: 6.48 inches
- Mounting-face thickness: 0.25 inches
- Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-8217; verify the specific rotor and attachment arrangement before ordering hardware
- Manufacturer installation note: 3.06 " diameter register with counterbore for register ring.
- Component: Parking-Brake Rotor Hat
- Material: Iron
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 1.700 inch
Fitment & Compatibility
Check the existing Chevrolet Corvette 1984–1987 brake conversions against the dimensions above. The hub flange and rotor attachment are separate interfaces and both must match the intended brake package. 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
PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.
