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Product details
A left-hand SRP surface orientation identifies this rear rotor for the corresponding side of the Pontiac GTO package. The black-finished iron casting carries the 12.19-inch friction face and parking drum in one piece, with a 2.310-inch offset. 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: 160-8745-BK
- Quantity: One rotor; not an axle pair
- Outside diameter: 12.19 inches
- Nominal thickness: 0.81 inches
- Rotor material: Iron
- Construction: 32 vanes
- Friction surface: SRP Drilled & Slotted
- Finish: Black Electro Coat
- Approximate weight: 15.80 lb
- Factory burnished: No
- Dynamically balanced: No
- Installation orientation: Left-hand
- Registration / lug inside diameter: 2.76 inches
- Far-side inside diameter: 6.70 inches
- Rotor offset: 2.310 inches
- Internal parking-brake drum diameter: 7.48 inches
- Internal clearance diameter: 6.38 inches
- Mounting-face thickness: 0.21 inches
- Hat wheel-stud clearance pattern: 5 x 4.75 inches
- Wheel-stud clearance hole diameter: 0.52 inches
- Opposite-hand companion rotor: 160-8744-BK (sold separately)
- Intended use and restrictions: Rear rotor for compatible Pontiac GTO kits with an internal parking drum.
The integral hat is part of the rotor; caliper, pads, parking-brake mechanism and installation hardware are separate.
Fitment & Compatibility
Verify the full GTO rear brake setup before ordering. Other Wilwood parking-drum rotors with a similar outside diameter can have different registers, drum diameters and offsets.
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.
