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Product details
Wilwood's multi-pattern rear parking hat has a 3.12-inch register and 1.540-inch offset. Confirm the 7.23-inch shoe bore and hub clearance. Wilwood Engineering designs and builds disc brake systems in Camarillo, California. Bill Wood established the company in 1977; it supplies brake rotors, calipers, master cylinders, valves, fittings and lines for specialized applications, street performance and motorsport. The complete brake system determines which individual components are appropriate.
Technical Details
- Manufacturer part number: 170-13909
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 1.540 inch
- 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, 5 x 4.75, 5 x 5.00 inches; verify the actual hub and wheel-stud clearance
- Center register diameter: 3.12 inches
- Rotor mounting hole/thread designation: 1/4-20
- Parking-shoe bore: 7.23 inches
- Internal clearance diameter: 6.85 inches
- Mounting-face thickness: 0.18 inches
- Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-8008; verify the specific rotor and attachment arrangement before ordering hardware
- Component: Parking-Brake Rotor Hat
- Material: Aluminum
- Surface finish: Black E-Coat
Fitment & Compatibility
Check the existing Matched big-brake parking systems 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
Contact PMB Performance with the brake-kit identification and measurements for help selecting the part. Our team brings over 20 years of experience.
