PowerStop AR8646XPR 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 AR8646XPR) is engineered for reliable braking performance on heavy-duty Chevrolet and GMC trucks. Designed specifically for rear axle applications, this rotor set offers enhanced heat dissipation and corrosion resistance to maintain consistent stopping power.

• Compatible with Chevrolet Express 3500, GMC Savana 3500, Sierra 3500, Sierra 3500 Classic, Sierra 3500 HD, Silverado 3500, Silverado 3500 Classic, and Silverado 3500 HD models
• Vented disc brake rotors with drilled and slotted surface for improved heat management
• Zinc plating provides rust-resistant coating to extend rotor life
• Nominal thickness of 30.00 mm with discard thickness at 28.50 mm ensures durability and safety
• Overall diameter of 324 mm (12.80 inches) and 8 lug holes for secure mounting

Detailed Product Features and Specifications

This Power Stop rotor pair features a vented design that promotes airflow to reduce heat buildup during braking, which is critical for heavy-duty vehicles like the Chevrolet Silverado 3500 and GMC Sierra 3500 HD. The drilled and slotted surface pattern helps evacuate brake dust, gas, and water, improving brake pad contact and reducing fade. The zinc plating on the rotors offers a protective layer against rust and corrosion, which is especially beneficial for vehicles exposed to harsh weather conditions.

With an overall height of 132.10 mm and a mounting bolt hole circle diameter of 165.10 mm, these rotors fit securely on the rear axle of compatible trucks. The 8 stud/lug hole configuration matches the wheel hub specifications of the listed Chevrolet and GMC models. The nominal thickness of 30.00 mm and discard thickness of 28.50 mm provide a clear maintenance threshold to ensure safe operation.

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 performance and durability for rear brake applications. This line incorporates drilled and slotted surfaces to enhance braking efficiency and zinc plating to resist corrosion, making it suitable for trucks that require dependable stopping power under demanding conditions.

Common Applications and Problem Solving

• Replacement for worn or warped rear brake rotors on Chevrolet Express 3500 and GMC Savana 3500
• Improves braking performance in heavy-duty use cases such as towing or hauling with Silverado 3500 models
• Reduces brake fade caused by excessive heat during prolonged braking
• Prevents rust and corrosion buildup that can lead to rotor surface degradation
• Restores proper rotor thickness to maintain safe braking distances

Installation Notes and Tips

• Ensure compatibility with vehicle make and model before installation
• Check rotor thickness and discard limits to confirm replacement necessity
• Clean mounting surfaces and inspect wheel hub for damage prior to installation
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Consider replacing brake pads simultaneously for optimal braking performance

Quality Assurance and Warranty

Power Stop rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The zinc plating process enhances corrosion resistance, 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. Always refer to the manufacturer’s warranty documentation for complete terms.