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Product details
The black electro-coated left-hand GT rotor adds a protective finish to the 14-inch Spec-37 casting. Its 72-vane core, slotted friction faces and thick 1.25-inch section remain matched to the specified twelve-bolt brake assembly. Wilwood’s calipers, rotors, master cylinders, valves, fittings and lines support complete disc brake systems rather than an isolated component choice. Founded in 1977 by Bill Wood and based in Camarillo, California, the company designs and manufactures these systems for motorsport, street performance and specialized applications. Correct pairing of the rotor with its surrounding hardware is essential.
Technical Details
- Manufacturer part number: 160-8399-GTB
- Quantity: One rotor; not an axle pair
- Outside diameter: 14.00 inches
- Nominal thickness: 1.25 inches
- Rotor material: Spec-37 Iron
- Construction: 72 curved vanes
- Friction surface: GT Slotted
- Finish: Black Electro Coat
- Approximate weight: 17.50 lb
- Factory burnished: No
- Dynamically balanced: Yes
- Installation orientation: Left-hand
- Rotor attachment pattern: 12 x 8.75 inches
- Rotor mounting hole / thread: 0.251 inches
- Registration / lug inside diameter: 8.25 inches
- Far-side inside diameter: 10.00 inches
- Opposite-hand companion rotor: 160-8398-GTB (sold separately)
- Intended use and restrictions: Suitable for high-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 8.25-inch registration diameter and left-side orientation. Coating and factory burnishing are separate attributes; this rotor is not factory burnished.
Wilwood product specifications · Rotor dimension diagram
Put PMB Performance’s 20-plus years of brake knowledge to work when matching this part to your build. We can help review the dimensions and application requirements.
