Wilwood Right SRP Small-Circle Mount Rotor, Black Spec-37, 13.00 x 1.10-inch

The smaller twelve-on-7.00-inch attachment circle is a defining feature of this right SRP rotor. Its 13.00-inch outside diameter and 1.10-inch section require the corresponding hat and caliper arrangement, not a twelve-on-8.75-inch assembly. Wilwood Engineering designs and manufactures disc brake systems from its base in Camarillo, California. Bill Wood founded the company in 1977; its range now includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized uses. Selection must account for the entire brake system.

Technical Details

• Manufacturer part number: 160-13362-BK
• Diameter and thickness: 13.00 inches diameter x 1.10 inches wide
• Ring material: Spec-37 Iron
• Face pattern and coating: SRP Drilled & Slotted; Black electrocoat
• Internal layout: 48 CV
• Mounting direction: Right-hand
• Balancing and burnishing: Factory burnished no; balanced yes
• Opposite-side component, ordered separately: 160-13363-BK
• Rotor-to-hat/hub attachment circle: 12 x 7.00 inches
• Attachment hole size or thread: 0.251 inches
• Center / lug registration: 6.38 inches
• Far-side inside diameter: 8.57 inches
• Approximate component weight: 14.40 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Compare the existing hat interface with the 12 x 7.00-inch rotor pattern, then check the 6.38-inch centering register. Proper axial placement and full pad contact are required around the 13.00-inch ring. A matching wheel-bolt pattern is not a substitute for this rotor-to-hat check. Wilwood specifies the SRP face treatment for street and moderate-temperature race duty; severe sustained racing calls for evaluation of the corresponding HD or GT option.

Manufacturer reference: Wilwood rotor specifications

PMB Performance has over 20 years of experience helping customers select brake components. Supplying the kit number, mounting dimensions and intended use makes that fitment check more useful.