PowerStop AR8661EVC Disc Brake Rotor - Front

Power Stop Front Genuine Geomet Coated Rotor Overview

The Power Stop - Front Genuine Geomet Coated Rotor (Part Number AR8661EVC) is engineered for reliable braking performance on select Buick, Chevrolet, Pontiac, and Saturn vehicles. Designed specifically for front disc brake applications, this rotor offers corrosion resistance and consistent thickness to maintain optimal stopping power.

• Compatible with Buick Montana, Chevrolet Relay, Pontiac Montana, Saturn Relay, Terraza, and Uplander models
• Part Number: AR8661EVC
• Vented disc brake rotor design for improved heat dissipation
• Rust resistant Geomet coating for extended rotor life
• Nominal thickness of 32.20 mm with discard thickness at 30.70 mm
• Overall height of 52.00 mm and outside diameter of 297.00 mm
• Mounting bolt hole circle diameter of 115.00 mm with 6 lug holes

Power Stop - Front Genuine Geomet Coated Rotor Product Line

The Power Stop - Front Genuine Geomet Coated Rotor line focuses on providing rotors with a durable Geomet coating that resists rust and corrosion. This coating helps maintain rotor integrity and appearance over time, especially in environments prone to moisture and road salt. The vented rotor design enhances heat dissipation, reducing the risk of brake fade during extended use. This product line is tailored for front brake applications on specific GM vehicles, ensuring proper fit and performance.

Detailed Product Description and Specifications

This disc brake rotor features a vented design to improve airflow and cooling during braking, which helps maintain consistent brake performance. The rotor's nominal thickness is 32.20 mm, with a discard thickness of 30.70 mm, indicating when replacement is necessary to maintain safety. The overall height measures 52.00 mm, and the outside diameter is 297.00 mm, matching factory specifications for compatible vehicles. The rotor includes a mounting bolt hole circle diameter of 115.00 mm and accommodates 6 lug holes, ensuring secure installation on the front axle.

Common Applications and Problem Solving

• Replacement for worn or warped front rotors on Buick Montana and Chevrolet Relay
• Addressing brake noise and vibration issues caused by uneven rotor surfaces
• Improving braking consistency on Pontiac Montana and Saturn Terraza models
• Preventing rust and corrosion damage in humid or salted road conditions
• Restoring proper rotor thickness to maintain safe stopping distances on Saturn Uplander

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (30.70 mm) before installation
• Clean mounting surfaces to prevent rotor runout and vibration
• Torque lug nuts to manufacturer specifications for secure fitment
• Inspect brake pads and replace if worn to optimize rotor performance
• Follow vehicle-specific service manual for front rotor replacement procedures

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 to extend rotor life. While specific warranty details are not provided here, Power Stop products typically come with a limited warranty against defects in materials and workmanship. Consult product packaging or manufacturer resources for exact warranty terms.