Wilwood Rear Nissan 350Z Iron Parking Hat, Confirm Supplied Offset and Drum-in-Hat Assembly

The Wilwood 350Z rear parking hat has a 6.77-inch shoe bore and 2.69-inch register. Confirm the supplied offset and matching drum-in-hat assembly. 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: 170-9455
• 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: 1.210 inches on the product page; 2.16 inches in DS559. 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 4.50 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 2.69 inches
• Rotor mounting hole/thread designation: 1/4-28
• Parking-shoe bore: 6.77 inches
• Internal clearance diameter: 6.65 inches
• Mounting-face thickness: 0.20 inches
• Hub-side hole clearance diameter(s): 0.510 inches; these are clearance dimensions, not wheel-stud thread sizes

Fitment & Compatibility

Match the iron hat to the specified Nissan 350Z rear parking-brake conversion, including the 6.77-inch shoe bore and 2.69-inch register. Wilwood gives 1.210-inch offset on the product page and 2.16 inches in DS559. Obtain confirmation of the supplied hat and the measurement reference before ordering. The twelve-bolt rotor ring, parking shoes and caliper position must match that confirmed configuration.

Manufacturer Reference

Wilwood component specifications and dimensions · Assembly instructions DS559

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