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Product details
On a compatible GM 1500 with the 16-inch rear brake conversion, this left-hand rotor restores the specified SRP friction surface. The 8.27-inch internal drum and 2.220-inch offset are integral to its disc/drum design, rather than separate bolt-on hat dimensions. Founded in 1977, Bill Wood’s Wilwood is based in Camarillo, California and designs and manufactures disc brake systems for motorsport, street performance and specialized applications. Its range runs from calipers and rotors to master cylinders, valves, fittings and lines. Choosing a rotor involves matching those surrounding components as well as the vehicle’s intended use.
Technical Details
- Manufacturer part number: 160-16663-BK
- Quantity: One rotor; not an axle pair
- Outside diameter: 16.00 inches
- Nominal thickness: 1.25 inches
- Rotor material: Iron
- Construction: 48 vanes
- Friction surface: SRP Drilled & Slotted
- Finish: Black Electro Coat
- Approximate weight: 39.48 lb
- Factory burnished: No
- Dynamically balanced: Yes
- Installation orientation: Left-hand
- Registration / lug inside diameter: 3.09 inches
- Far-side inside diameter: 11.05 inches
- Rotor offset: 2.220 inches
- Internal parking-brake drum diameter: 8.27 inches
- Internal clearance diameter: 7.56 inches
- Mounting-face thickness: 0.24 inches
- Hat wheel-stud clearance pattern: 6 x 5.50 inches
- Wheel-stud clearance hole diameter: 0.63 inches
- Opposite-hand companion rotor: 160-16662-BK (sold separately)
- Intended use and restrictions: Rear rotor for matching six-lug GM 1500 brake 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 exact conversion and its six-on-5.50-inch stud layout. The rotor’s 3.09-inch registration bore must seat correctly on the intended hub or axle flange.
Wilwood product specifications
PMB Performance offers more than 20 years of brake experience and practical help with replacement parts. Contact our team if you need assistance confirming the rotor for your installation.
