Fitment questions?
Call (855) 786-7101 or text (801) 304-3141.
Real people. Real answers.
Product details
Wilwood's 0.635-inch-offset front hat has 5 x 4.25 and 5 x 4.50-inch flange patterns. Confirm the 0.31-inch face and twelve-bolt ring. Wilwood Engineering is a Camarillo, California manufacturer founded by Bill Wood in 1977. Disc brake design and manufacturing extend across calipers, brake rotors, master cylinders, valves, fittings and brake lines. Parts for street-performance, specialized applications and motorsport must be selected to meet the requirements of the complete brake system.
Technical Details
- Manufacturer part number: 170-13024
- Hat offset: 0.635 inch
- Rotor attachment interface: 12 x 8.75 inches; rotor attachment, separate from the hub flange
- Hub-flange mounting/clearance pattern(s): 5 x 4.25, 5 x 4.50 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: 7.12 inches
- Mounting-face thickness: 0.31 inches
- Hub-side hole clearance diameter(s): 0.580, 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
- 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: Front
Fitment & Compatibility
Identify the installed brake conversion before choosing this hat for Matched big-brake conversions. The offset, center register and attachment hardware must agree with the rotor and hub in that assembly. 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
Our team at PMB Performance has over 20 years of parts and fitment experience. The existing component number and brake-system details help us check the match.
