PowerStop AR8659EVC Disc Brake Rotor - Front

Power Stop Front Genuine Geomet Coated Rotor Overview

The Power Stop - Front Genuine Geomet Coated Rotor (Part Number AR8659EVC) is engineered for reliable braking performance on select Buick, Chevrolet, GMC, Isuzu, and Saab vehicles. Designed specifically for front disc brake applications, this rotor offers durability and corrosion resistance to maintain consistent stopping power.

• Compatible with Buick, Chevrolet, GMC, Isuzu, and Saab models including 9-7x, Ascender, Envoy, Rainier, and Trailblazer
• Vented disc brake rotor design for improved heat dissipation
• Rust resistant Geomet coating to protect against corrosion
• Nominal thickness of 29.00 mm with a discard thickness of 27.50 mm
• Overall height of 54.20 mm and outside diameter of 301.80 mm
• Mounting bolt hole circle diameter of 127.00 mm with 6 stud/lug holes

Product Line Details: Power Stop - Front Genuine Geomet Coated Rotor

This rotor is part of the Power Stop - Front Genuine Geomet Coated Rotor line, which focuses on providing rotors with a factory-style Geomet coating. This coating enhances rust resistance and extends rotor life, making it suitable for vehicles exposed to harsh weather conditions. The vented rotor design helps maintain optimal braking temperatures, reducing the risk of brake fade during extended use.

Technical Specifications and Features

The AR8659EVC rotor features a vented design that improves airflow and heat dissipation, critical for maintaining brake performance under demanding conditions. The nominal thickness of 29.00 mm ensures structural integrity, while the discard thickness of 27.50 mm indicates when the rotor should be replaced to maintain safety. The rotor’s overall height measures 54.20 mm, and it has an outside diameter of 301.80 mm, matching OEM specifications for proper fitment. The mounting bolt hole circle diameter is 127.00 mm with 6 lug holes, ensuring compatibility with specified vehicle models.

Applications and Problem Solving

• Replacement for worn or warped front disc brake rotors on Buick 9-7x and Chevrolet Trailblazer
• Restores braking efficiency on GMC Envoy and Isuzu Ascender with original equipment specifications
• Addresses rotor corrosion issues with rust resistant Geomet coating
• Helps reduce brake fade caused by overheating during heavy braking
• Ensures proper rotor thickness for safe braking performance

Installation Notes and Tips

• Verify vehicle compatibility with Buick, Chevrolet, GMC, Isuzu, or Saab models listed before installation
• Inspect calipers and brake pads for wear when replacing rotors
• Ensure mounting surfaces are clean and free of debris for proper rotor seating
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Check rotor thickness with a micrometer to confirm discard limits before installation

Quality Assurance and Warranty

Power Stop rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The Geomet coating provides enhanced corrosion resistance, contributing to longer rotor life. While specific warranty details for part number AR8659EVC should be confirmed with the manufacturer, Power Stop typically offers limited warranties covering defects in materials and workmanship.