PowerStop AR8642 Disc Brake Rotor - Front

Power Stop Front OE Stock Replacement Brake Rotor Overview

The Power Stop - Front OE Stock Replacement Brake Rotor AR8642 is engineered to provide reliable braking performance for select GM vehicles. Designed as a direct replacement, this vented disc brake rotor meets original equipment specifications for thickness and dimensions, ensuring consistent stopping power and durability.

• Compatible with Cadillac, Chevrolet, GMC, and Hummer models including Avalanche 2500, DeVille, Express 2500/3500, H2, Savana 2500, Sierra 1500/1500 HD/1500 HD Classic/2500, Silverado 1500 HD/1500 HD Classic/2500, Suburban 2500, and Yukon XL 2500
• Part number AR8642 for precise fitment
• Vented rotor design for improved heat dissipation
• Nominal thickness of 1.50 inches (38.10 mm) with discard thickness at 1.44 inches (36.50 mm)
• Outside diameter of 12.80 inches (324.00 mm) and overall height of 3.50 inches (89.40 mm)
• Mounting bolt hole circle diameter of 6.50 inches (165.10 mm) with 8 stud/lug holes

About the Power Stop Front OE Stock Replacement Brake Rotor Line

The Power Stop - Front OE Stock Replacement Brake Rotor line is designed to match original equipment specifications for front disc brake rotors. This product line focuses on providing a direct OE replacement that maintains factory performance and fitment without additional coatings or modifications. The AR8642 rotor is a vented type, which helps reduce brake fade by improving heat dissipation during braking cycles, making it suitable for heavy-duty and full-size GM trucks and SUVs.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 1.50 inches (38.10 mm) and a discard thickness of 1.44 inches (36.50 mm), ensuring it meets safety standards for wear limits. The vented design enhances cooling efficiency, which is critical for vehicles like the Chevrolet Silverado 2500 and GMC Sierra 1500 HD that often handle heavy loads. The rotor measures 12.80 inches (324.00 mm) in outside diameter and has an overall height of 3.50 inches (89.40 mm), matching OEM dimensions for proper caliper clearance and brake pad contact. The mounting bolt hole circle diameter is 6.50 inches (165.10 mm) with 8 stud/lug holes, providing secure attachment to the hub assembly.

Common Applications and Problem Solving

• Replacement for worn or warped front brake rotors on compatible GM trucks and SUVs
• Addresses brake pulsation or vibration caused by uneven rotor surfaces
• Restores proper rotor thickness to maintain braking efficiency and safety
• Improves heat dissipation to reduce brake fade during heavy towing or hauling
• Eliminates noise and uneven pad wear associated with damaged rotors

Installation Notes and Tips

When installing the Power Stop AR8642 rotor, ensure the rotor surface is clean and free of any rust or debris before mounting. Verify that the rotor thickness is above the discard thickness limit of 1.44 inches (36.50 mm) to maintain safe operation. Use proper torque specifications for the 8 lug nuts to secure the rotor firmly. It is recommended to inspect brake pads and calipers during installation to ensure overall brake system integrity.

Quality Assurance and Warranty

Power Stop manufactures the AR8642 rotor to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided, Power Stop products typically undergo rigorous quality control to ensure durability and consistent performance on vehicles such as the Cadillac DeVille and GMC Yukon XL 2500.