PowerStop AR8644XPR Disc Brake Rotor Set - Rear

Power Stop Rear Drilled, Slotted and Zinc Plated Brake Rotor Pair Overview

The Power Stop - Rear Drilled, Slotted and Zinc Plated Brake Rotor Pair (Part Number AR8644XPR) is engineered for reliable braking performance on heavy-duty Chevrolet and GMC trucks and SUVs. Designed specifically for rear axle applications, this rotor set offers enhanced heat dissipation and corrosion resistance to maintain consistent stopping power.

• Compatible with Chevrolet Silverado 2500, 3500, Suburban 2500, Avalanche 2500, and GMC Sierra 1500, 2500, 3500, Yukon XL 2500 models
• Vented disc brake rotors with drilled and slotted surface for improved heat management
• Zinc plated finish provides rust resistance and extended rotor life
• Nominal thickness of 29.20 mm and discard thickness of 27.00 mm for precise wear limits
• Overall diameter of 330 mm (13 inches) and 8 lug/stud holes for secure mounting

Detailed Product Features and Specifications

This Power Stop rotor pair features a vented design that promotes airflow to reduce brake fade during heavy braking conditions common in trucks like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD. The drilled and slotted surface pattern helps evacuate brake dust, water, and gases, improving pad bite and overall braking efficiency. The zinc plating on the rotors offers a protective coating against rust and corrosion, which is especially beneficial for vehicles exposed to harsh weather or road salt.

Each rotor has a nominal thickness of 29.20 mm and a discard thickness of 27.00 mm, ensuring you can monitor wear and replace the rotors before performance is compromised. The overall height measures 91.40 mm, and the mounting bolt hole circle diameter is 165.10 mm with 8 lug holes sized at 6.50 mm, matching factory specifications for a direct fit on compatible Chevrolet and GMC models.

About the Power Stop - Rear Drilled, Slotted and Zinc Plated Brake Rotor Pair Line

The Power Stop - Rear Drilled, Slotted and Zinc Plated Brake Rotor Pair product line focuses on delivering rotors that combine enhanced braking performance with durability. This line is designed to meet the demands of heavy-duty trucks and SUVs by incorporating vented rotors with drilled and slotted surfaces and corrosion-resistant zinc plating. These features work together to provide consistent braking under load while extending rotor service life.

Common Applications and Problem Solving

• Replacement for worn or warped rear brake rotors on Chevrolet Avalanche 2500 and GMC Sierra 2500 HD
• Improves braking response and heat dissipation for heavy towing or hauling with Silverado 3500 HD
• Reduces brake fade caused by excessive heat buildup during extended downhill driving
• Prevents rust and corrosion on rotors exposed to moisture and road salt
• Restores proper rotor thickness and surface condition for safe braking performance

Installation Notes and Tips

• Ensure vehicle compatibility with Chevrolet and GMC models listed before installation
• Inspect brake pads and replace if worn to maintain optimal rotor contact
• Clean mounting surfaces and hub to prevent rotor runout and vibration
• Torque lug nuts to manufacturer specifications to avoid rotor damage
• Perform a bed-in procedure after installation to optimize rotor and pad performance

Quality Assurance and Warranty

Power Stop rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The zinc plating provides additional protection against corrosion, contributing to longer rotor life. While specific warranty details are not provided here, Power Stop products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.