Wilwood Rear Flared-Bell Rotor Hat, 1.750-Inch Offset and Dual-Pattern Flange

A 1.750-inch offset and dual-pattern flange define this Wilwood rear hat. Match the 3.06-inch register and twelve-bolt rotor hardware. 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: 170-14268
• Hub-side hole clearance diameter(s): 0.560 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
• Manufacturer installation note: 3.06 " diameter register with counterbore for register ring.
• Component: Flared-Bell Brake Rotor Hat
• Material: Aluminum
• Surface finish: Black E-Coat
• Rotor mounting method: Fixed Mount
• Position in the specified brake assembly: Rear
• Hat offset: 1.750 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 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 3.06 inches
• Rotor mounting hole/thread designation: 1/4-20
• Internal clearance diameter: 6.41 inches
• Mounting-face thickness: 0.25 inches

Fitment & Compatibility

This rear flared-bell hat uses a 1.750-inch offset, with 0.560-inch clearance holes in both listed hub-flange patterns. Match the 5 x 4.50/4.75-inch mounting arrangement to the hub and check the separate 12 x 8.75-inch rotor connection. Wilwood documents the hat in its rear conversion kits; a front hat of similar diameter is not established as interchangeable.

Manufacturer Reference

Wilwood component specifications and dimensions

For fitment assistance backed by more than 20 years of experience, share the installed brake configuration with PMB Performance before ordering.