Wilwood Rear F150 Parking Hat with 8.11-Inch Shoe Bore

Wilwood's F150 rear parking hat has a 3.55-inch register and 2.000-inch offset. Verify the 8.11-inch shoe bore and twelve-bolt rotor ring. Bill Wood’s 1977 founding of Wilwood Engineering began a disc brake design and manufacturing business based in Camarillo, California. The range includes master cylinders, calipers, rotors, brake lines, valves and fittings for motorsport, street-performance and specialized vehicles. Component selection must consider the complete braking arrangement.

Technical Details

• Manufacturer part number: 170-15273
• Manufacturer-listed attachment hardware reference: 230-8217; 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: 2.000 inch
• Rotor attachment interface: 12 x 9.19 inches; rotor attachment, separate from the hub flange
• Hub-flange mounting/clearance pattern(s): 6 x 5.32 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 3.55 inches
• Rotor mounting hole/thread designation: 1/4-28
• Parking-shoe bore: 8.11 inches
• Internal clearance diameter: 7.51 inches
• Mounting-face thickness: 0.31 inches
• Hub-side hole clearance diameter(s): 0.590 inches; these are clearance dimensions, not wheel-stud thread sizes

Fitment & Compatibility

Use this replacement only within the specified Ford F150 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

Ask PMB Performance for help comparing the installation requirements. We have more than 20 years of experience working with brake parts and fitment.