Wilwood Rear Subaru Parking-Brake Hat, Iron Construction and 6.69-Inch Shoe Bore

Iron construction and a 6.69-inch shoe bore distinguish this Wilwood Subaru rear hat. Match the parking mechanism and 1.640-inch offset. 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: 170-10108
• Center register diameter: 2.29 inches
• Rotor mounting hole/thread designation: 1/4-28
• Parking-shoe bore: 6.69 inches
• Internal clearance diameter: 5.76 inches
• Mounting-face thickness: 0.26 inches
• Hub-side hole clearance diameter(s): 0.510 inches; these are clearance dimensions, not wheel-stud thread sizes
• Manufacturer-listed attachment hardware reference: 230-7011; verify the specific rotor and attachment arrangement before ordering hardware
• 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: 1.640 inch
• Rotor attachment interface: 8 x 7.78 inches; rotor attachment, separate from the hub flange
• Hub-flange mounting/clearance pattern(s): 5 x 3.93 inches; verify the actual hub and wheel-stud clearance

Fitment & Compatibility

Use this replacement only within the specified Subaru brake conversions. Compare the hub, caliper position and rotor attachment to the complete assembly drawing. 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.