Wilwood Front BMW E46 (1999–2006) Conversion Hat, 0.750-Inch Offset

For the specified 1999–2006 BMW E46 brake conversion, this Wilwood front hat uses a 3.12-inch register. Match the 0.750-inch offset and rotor. Established in 1977 by Bill Wood, Camarillo, California-based Wilwood Engineering designs and manufactures disc brake systems. Its master cylinders, calipers, brake rotors, lines, fittings and valves support motorsport, street-performance and specialized applications, with each component selected for its role in the complete brake system.

Technical Details

• Manufacturer part number: 170-11975
• Hub-side hole clearance diameter(s): 0.500 inches; these are clearance dimensions, not wheel-stud thread sizes
• Manufacturer-listed attachment hardware reference: 230-4572; verify the specific rotor and attachment arrangement before ordering hardware
• Component: Short-Offset Brake Rotor Hat
• Material: Aluminum
• Surface finish: Black E-Coat
• Rotor mounting method: Fixed Mount
• Position in the specified brake assembly: Front
• Hat offset: 0.750 inch
• Rotor attachment interface: 12 x 8.75 inches; rotor attachment, separate from the hub flange
• Hub-flange mounting/clearance pattern(s): 5 x 4.72 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 3.12 inches
• Rotor mounting hole/thread designation: 1/4-20
• Internal clearance diameter: 8.01 inches
• Mounting-face thickness: 0.25 inches

Fitment & Compatibility

Use this replacement only within the specified BMW E46 1999–2006 brake conversions. Compare the hub, caliper position and rotor attachment to the complete assembly drawing. Select the rotor and attachment hardware separately for the documented assembly. Follow the installation drawing for engagement and clearance at every mounting point.

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.