Wilwood HPS Six-on-5.50-inch Rotor, Plain-Finish GT-Slotted 12.19-inch Ring and 1.52-inch Hat

This six-lug HPS casting provides GT slots while keeping a plain iron finish. Its 12.19 x 1.10-inch ring and integral 1.52-inch hat should be selected as a dimensional assembly, not as a wheel-pattern conversion. Founded by Bill Wood in 1977, Camarillo, California-based Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its calipers and brake rotors work alongside its master cylinders, valves, fittings and brake lines, with each individual component selected according to the complete system's requirements.

Technical Details

• Manufacturer part number: 160-15783
• Outside diameter / width: 12.19 inches diameter x 1.10 inches wide
• Material specification: Iron
• Friction surface / finish: GT Slotted; Plain
• Ventilation: 32 vanes; straight
• Mounting direction: Non-directional
• Preparation: Balanced: yes; factory burnished: no
• Hat wheel-stud clearance pattern: 6 x 5.50 inches
• Stud clearance-hole sizes: 0.52 inches
• Center registration: 3.06 inches
• Far-side inside diameter: 8.34 inches
• Hat offset: 1.520 inches
• Inside clearance diameter: 7.11 inches
• Hat mounting-face thickness: 0.25 inches
• Approximate weight: 19.00 lb
• Quantity: one rotor with integral hat; separate hub, pads, calipers, mounting hardware and any parking-brake mechanism are not included

Fitment & Compatibility

Use with the matching six-lug brake assembly requiring a 12.19 x 1.10-inch rotor and 1.52-inch hat offset. Check its 3.06-inch center on the retained hub, then verify caliper centering and pad sweep. The six-on-5.50-inch holes are stud clearances and do not convert the wheel pattern.

Manufacturer reference: Wilwood rotor specifications

Over 20 years of brake and parts experience support PMB Performance's fitment assistance. We can help assess the specified rotor against the hardware already on the vehicle.