Wilwood 160-9960 for Rotor-GT48 Vented Iron-LH 12.88 x .810 - 12 on 8.75in

Vehicle Fitment

• Universal application -- fits custom / aftermarket spindles accepting 12.88" rotors with 12 on 8.75" bolt pattern

Fitment Notes

• Left-hand side rotor; must match right side part #160-9959 (Right Hand) or paired set.
• 12 on 8.75" (12x8.75") bolt circle -- typically used in custom builds, tube-axle spindles and purpose-built race cars.
• Check wheel clearance: requires ~13" minimum wheel diameter due to rotor diameter (12.88").
• Intended for performance/competition use -- not a direct OE fitment for standard factory spindles unless adapter used.

Features

• GT-48 curved vane venting: 48 directional, curved vanes improve cooling and reduce rotor heat-soak.
• Slotted surface design for improved pad bite, gas evacuation and brake performance under high stress.
• Cast from premium long-grain carbon iron for thermal stability, wear resistance and distortion control.
• Precision machined faces and outer diameter to <0.001" run-out for optimal rotor flatness and parallelism.
• Dynamically balanced individually to reduce vibration at speed for high-performance driving.
• Heavy-duty build suitable for both street rod and moderate road-race duty applications.

Specifications

• Part Number: 160-9960
• Rotor Diameter: 12.88" (327 mm)
• Width/Thickness: 0.81" (20.6 mm)
• Material: Cast iron, GT-series heavy wall
• Vane Count: 48 curved vanes (GT-48)
• Bolt Pattern: 12 bolts on 8.75" (222.25 mm) B.C.
• Mount Side: Left Hand (LH)
• Weight: Approx. 10.2 lbs (4.63 kg)

Included Components

• 1x Wilwood 160-9960 GT-48 Slotted Rotor (Left Hand)

Product Description

The Wilwood 160-9960 GT-48 Slotted Rotor is engineered for high-performance and motorsport use where exceptional cooling, durability and extreme braking performance are required. With a 12.88" diameter and 48 curved vanes, this rotor offers elevated heat dissipation and stability under heavy braking loads. The slotted face further improves pad engagement, gas evacuation and consistent braking feel.

While this rotor is not tied to a specific factory vehicle application, it is ideal for custom builds, street rod conversions, tube-axle setups and road-race cars using a 12x8.75" bolt pattern and requiring a high-duty rotor. It's designed to be paired with the right-hand counterpart (#160-9959) for a full axle set. Before installation, ensure compatibility with wheel size (min ~13"), caliper clearance, hub dimensions and bolt pattern. This is a precision-machined rotor built for serious braking performance.