Wilwood Rear Lancer Evolution Iron Parking Hat, Confirm Supplied Offset

This iron Wilwood Lancer Evolution rear hat has a 6.61-inch shoe bore and 3.54-inch register. Confirm the supplied offset and parking-brake assembly. Disc brake system design and manufacturing are Wilwood Engineering’s focus. Bill Wood founded the Camarillo, California company in 1977; its range spans brake rotors, master cylinders, calipers, fittings, valves and brake lines for motorsport, specialized and street-performance applications. The choice of individual components depends on the complete brake system.

Technical Details

• Manufacturer part number: 170-9599
• Material: Iron
• Surface finish: Black E-Coat
• Rotor mounting method: Fixed Mount
• Position in the specified brake assembly: Rear
• Hat offset: 0.810 inch on the product and kit pages; 1.32 inches in DS558. 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: 3.54 inches
• Rotor mounting hole/thread designation: 1/4-28
• Parking-shoe bore: 6.61 inches
• Internal clearance diameter: 6.11 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
• Manufacturer-listed attachment hardware reference: 230-8217; verify the specific rotor and attachment arrangement before ordering hardware
• Component: Parking-Brake Rotor Hat

Fitment & Compatibility

Select this hat for the exact Mitsubishi Lancer Evolution brake conversions and installed hub arrangement. Compare the original part, rotor mounting circle and required hardware before replacing any component. Wilwood publishes 0.810 inch on the product and kit pages and 1.32 inches in DS558. Confirm the supplied offset and its reference faces; the measurements are not treated as interchangeable. 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 · Manufacturer brake-kit reference · Assembly instructions DS558

PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.