Perfect Stop 6620666 Disc Brake Rotor - Front

Overview of Perfect Stop Gray Armor-Plate Premium Rotor

The Perfect Stop Gray Armor-Plate, Premium disc brake rotor (Part Number 6620666) is engineered for reliable braking performance on select Lexus, Scion, and Toyota models. Designed specifically for vehicles like the Lexus HS250h, Toyota Prius V, RAV4, and Scion xB, this vented rotor offers consistent heat dissipation and smooth braking response.

• Vented disc brake rotor with smooth surface finish
• Outside diameter of 10.827 inches (275.0 mm)
• Nominal thickness of 0.984 inches (25.0 mm) with discard thickness at 0.866 inches (22.0 mm)
• Overall height measures 1.823 inches (46.3 mm)
• Five mounting bolt holes with a 4.5 inch (114.3 mm) bolt circle diameter
• Center hole diameter of 2.441 inches (62.0 mm)
• ABS tone ring not included

Product Line Details: Gray Armor-Plate, Premium

The Gray Armor-Plate, Premium line from Perfect Stop focuses on delivering durable rotors with enhanced surface protection. This product line features a smooth surface type designed to reduce brake noise and provide consistent pad contact. The vented rotor design improves heat dissipation, which helps maintain braking efficiency during extended use. This rotor is engineered to meet the specifications required by Lexus, Scion, and Toyota vehicles, ensuring compatibility and performance.

Technical Specifications and Features

This disc brake rotor is vented to allow better airflow and heat management, which is critical for preventing brake fade during heavy braking. The nominal thickness of 0.984 inches (25.0 mm) ensures structural integrity, while the discard thickness of 0.866 inches (22.0 mm) indicates the minimum safe thickness before replacement is necessary. The rotor’s overall height of 1.823 inches (46.3 mm) and outside diameter of 10.827 inches (275.0 mm) are designed to fit the brake assemblies of the specified vehicle models precisely. The five mounting bolt holes with a 4.5 inch (114.3 mm) bolt circle diameter and a center hole diameter of 2.441 inches (62.0 mm) provide secure and accurate installation.

Compatible Vehicles and Common Applications

• Replacement rotor for Lexus HS250h models
• Suitable for Toyota Prius V brake system upgrades
• Compatible with Toyota RAV4 disc brake assemblies
• Fits Scion xB brake rotor requirements
• Ideal for addressing rotor wear, vibration, and braking noise issues

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness to confirm it meets or exceeds the discard thickness of 0.866 inches (22.0 mm). Use proper torque specifications for the five mounting bolts on the 4.5 inch (114.3 mm) bolt circle diameter to avoid warping. Since this rotor does not include an ABS tone ring, confirm compatibility with your vehicle’s ABS system. It is recommended to replace brake pads simultaneously to maintain optimal braking performance.

Quality Assurance and Warranty

Perfect Stop rotors are manufactured to meet OEM specifications for fit and function. The Gray Armor-Plate, Premium rotors undergo quality control processes to ensure durability and consistent performance. While specific warranty details are not provided, Perfect Stop products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.