Wilwood 160-9959 GT-48 12.88in Slotted Performance Rotor 0.81in RH 12x8.75

Vehicle Fitment

• Universal application - for custom builds, performance spindles or aftermarket hubs requiring 12.88" rotor diameter and 12 on 8.75" bolt pattern.

Fitment Notes

• Right-Hand side rotor only - use with corresponding left-hand rotor (part 160-9960) for full axle set.
• Bolt pattern: 12 x 8.75" (222.25 mm) - verify hub/axle match before purchasing.
• Requires ~13" or larger wheel clearance due to rotor size.
• Intended for high-performance custom applications, not guaranteed to fit factory OE setups without modification.

Features

• GT-48 heavy-wall cast iron with 48 curved vanes for excellent heat dissipation.
• Slotted rotor face to enhance pad bite and gas/heat evacuation under load.
• Precision machined to <0.001" run-out for flatness and balance.
• Individually dynamically balanced to minimize vibration at high speeds.

Specifications

• Part Number: 160-9959
• Diameter: 12.88" (327 mm)
• Width/Thickness: 0.81" (20.6 mm)
• Material: Premium long-grain carbon iron
• Vane Count: 48 curved vanes
• Bolt Pattern: 12 on 8.75" (222.25 mm)
• Position: Right-Hand (RH) rotor

Included Components

• 1x Wilwood 160-9959 GT-48 Slotted Rotor (RH)

Product Description

The Wilwood 160-9959 GT-48 performance rotor is engineered for high-duty use in custom and motorsport applications. With a large 12.88" diameter, heavy-wall design, and 48 curved vanes, it offers exceptional cooling and durability under severe braking conditions. The slotted face further enhances pad contact and evacuation of heat and gases, making it ideal for track or performance street duty.

Because this rotor is designed for custom hub setups with a 12-bolt on 8.75" bolt circle, it is not a direct OE replacement for most factory vehicles. Fitment must be verified for wheel clearance, hub pattern, mounting compatibility and caliper clearance before installation. Pair with the matching LH rotor (160-9960) to complete an axle set for balanced braking performance.