PowerStop AR8640 Disc Brake Rotor - Front

Power Stop Front OE Stock Replacement Brake Rotor Overview

The Power Stop - Front OE Stock Replacement Brake Rotor AR8640 is engineered for reliable braking performance on select GM vehicles. Designed as a direct replacement for front disc brake rotors, this vented rotor meets original equipment specifications for thickness and dimensions.

• Part Number: AR8640
• Vented disc brake rotor for improved heat dissipation
• Outside diameter: 12.00 inches (305.00 mm)
• Nominal thickness: 1.14 inches (28.90 mm)
• Discard thickness: 1.07 inches (27.20 mm)
• Overall height: 2.30 inches (58.20 mm)
• Mounting bolt hole circle diameter: 5.50 inches (139.70 mm)
• 6 stud/lug hole quantity
• No rust resistant coating

Detailed Product Description

This Power Stop front disc brake rotor is designed to match the original equipment specifications for a precise fit and consistent braking performance. The vented rotor design enhances heat dissipation during braking, helping to reduce brake fade under normal driving conditions. With an outside diameter of 12 inches and a nominal thickness of 1.14 inches, this rotor is suitable for front brake applications on various GM trucks and SUVs.

The AR8640 rotor features a discard thickness of 1.07 inches, indicating the minimum safe thickness before replacement is necessary. The overall height of 2.30 inches ensures compatibility with the original caliper and wheel assembly. The mounting bolt hole circle diameter of 5.50 inches and six lug holes provide secure installation on compatible vehicles.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, Silverado 1500 Classic, Suburban 1500, Tahoe
• GMC Sierra 1500, Sierra 1500 Classic, Yukon, Yukon XL 1500
• Chevrolet Astro, Express 1500, Express 2500, Safari, Savana 1500, Savana 2500

This rotor is intended for front brake replacement on these specific makes and models, ensuring proper fitment and performance.

Power Stop - Front OE Stock Replacement Brake Rotor Product Line

The Power Stop - Front OE Stock Replacement Brake Rotor line focuses on providing direct OE replacement parts that meet factory specifications. This product line is designed for customers seeking reliable, no-frills brake rotors that maintain the original braking feel and fitment. The AR8640 rotor exemplifies this approach by offering a vented design and precise dimensions without additional coatings or modifications.

Common Issues Addressed by This Rotor

• Brake rotor wear and thinning beyond discard thickness
• Warped or uneven rotor surfaces causing brake pulsation
• Reduced braking efficiency due to heat buildup
• Corrosion-related rotor damage (note: no rust resistant coating)
• Compatibility issues with original front brake assemblies on listed GM models

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean mounting surfaces to prevent uneven rotor seating
• Torque lug nuts to manufacturer specifications for secure fitment
• Inspect brake pads and calipers during rotor replacement
• Test brakes at low speed after installation to confirm proper operation

Quality Assurance

Power Stop manufactures this rotor to meet or exceed original equipment standards for fit and function. While no specific warranty information is provided, the product line emphasizes OE stock replacement quality to ensure dependable braking performance on compatible Cadillac, Chevrolet, and GMC vehicles.