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Product details
This Wilwood Ram 2500/3500 front hat uses an eight-hole hub flange. Confirm the conflicting published offset before matching the rotor assembly. Since its founding by Bill Wood in 1977, Wilwood Engineering has focused on disc brake system design and manufacturing. Based in Camarillo, California, it offers calipers, rotors, brake lines, master cylinders, fittings and valves for motorsport, street-performance and specialized installations. Choose components to satisfy the requirements of the entire braking system.
Technical Details
- Manufacturer part number: 170-15383
- Hub-flange mounting/clearance pattern(s): 8 x 6.50 inches; verify the actual hub and wheel-stud clearance
- Center register diameter: 4.84 inches
- Rotor mounting hole/thread designation: 5/16-18
- Internal clearance diameter: 8.57 inches
- Mounting-face thickness: 0.45 inches
- Hub-side hole clearance diameter(s): 0.640 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-14086; verify the specific rotor and attachment arrangement before ordering hardware
- Component: Truck Brake Rotor Hat
- Material: Aluminum
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Front
- Hat offset: 1.134 inches on the product page; 1.34 inches in DS1291. Confirm the supplied dimension and measurement reference with Wilwood.
- Rotor attachment interface: 12 x 9.75 inches; rotor attachment, separate from the hub flange
Fitment & Compatibility
Identify the installed brake conversion before choosing this hat for Ram 2500 and 3500 brake conversions. The offset, center register and attachment hardware must agree with the rotor and hub in that assembly. Wilwood publishes 1.134 inches on the product page and 1.34 inches in DS1291. Confirm the supplied offset and its reference faces; the measurements are not treated as interchangeable. 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 · Assembly instructions DS1291
PMB Performance can help identify the required brake component with over 20 years of parts experience. Send the kit details and original-part measurements.
