Wilwood Right-Hand SRP Spec-37 Rotor, 12 x 0.81 Inches, 36 Vanes

A 12-inch working diameter and 36-curved-vane Spec-37 core distinguish this SRP ring from the nearby 11.75- and 12.19-inch sizes. Its right-hand drilled-and-slotted face is paired with a 0.81-inch section and an eight-hole flange. Wilwood began in 1977 with founder Bill Wood and is based in Camarillo, California, where it designs and manufactures disc brake systems. Calipers and rotors sit alongside master cylinders, valves, fittings and lines in a range serving motorsport, street performance and specialized applications. Selecting these parts together is essential to a correctly matched brake installation.

Technical Details

• Manufacturer part number: 160-8496-BK
• Quantity: One rotor; not an axle pair
• Outside diameter: 12.00 inches
• Nominal thickness: 0.81 inches
• Rotor material: Spec-37 Iron
• Construction: 36 curved vanes
• Friction surface: SRP Drilled & Slotted
• Finish: Black Electro Coat
• Approximate weight: 8.30 lb
• Factory burnished: No
• Dynamically balanced: No
• Installation orientation: Right-hand
• Rotor attachment pattern: 8 x 7.00 inches
• Rotor mounting hole / thread: 0.326 inches
• Registration / lug inside diameter: 6.38 inches
• Far-side inside diameter: 8.41 inches
• Opposite-hand companion rotor: 160-8497-BK (sold separately)
• Intended use and restrictions: For racing durability, Wilwood recommends comparable HD or GT rotors. Suitable for moderate-temperature racing and street use. Spec-37 heavy-wall castings.

The hat or hub, fasteners, caliper and pads are not included.

Fitment & Compatibility

Confirm the 7.00-inch attachment circle and 8.41-inch far-side clearance. Wilwood recommends comparable HD or GT designs for the highest durability in racing use.

Wilwood product specifications · Rotor dimension diagram

PMB Performance has supported brake projects for more than 20 years. Our team can help identify the correct replacement when your caliper, hat or hub configuration needs a closer look.