Perfect Stop 661907 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Lexus and Toyota Vehicles

The Perfect Stop Gray Armor-Plate, Premium disc brake rotor (part number 661907) is engineered to meet the braking demands of Lexus and Toyota models including the Highlander, RX350, RX450h, and Sienna. Designed with precise dimensions and a solid construction, this rotor ensures consistent performance and durability.

• Compatible with Lexus Highlander, RX350, RX450h, and Toyota Sienna
• Part Number: 661907 for accurate identification
• Solid disc brake rotor with smooth surface finish
• Outside diameter: 12.165 inches (309.0 mm)
• Nominal thickness: 0.394 inches (10.0 mm); discard thickness: 0.335 inches (8.5 mm)
• Overall height: 2.469 inches (62.7 mm)
• Mounting bolt hole quantity: 5 with 4.5 inch (114.3 mm) bolt circle diameter
• Center hole diameter: 2.441 inches (62.0 mm)
• ABS tone ring not included

About the Gray Armor-Plate, Premium Product Line

The Gray Armor-Plate, Premium line from Perfect Stop focuses on delivering rotors with enhanced surface protection and durability. This product line features a smooth surface type rotor designed to provide reliable braking performance while resisting corrosion and wear. The premium coating helps extend rotor life, making it suitable for daily driving conditions on compatible Lexus and Toyota vehicles.

Product Specifications and Features

This disc brake rotor is a solid type, which means it does not have ventilation channels. It measures 12.165 inches in outside diameter and has a nominal thickness of 0.394 inches, with a discard thickness of 0.335 inches to indicate when replacement is necessary. The overall height of 2.469 inches ensures proper fitment and alignment with the vehicle’s braking system. The rotor includes five mounting bolt holes arranged on a 4.5 inch bolt circle diameter, and a center hole diameter of 2.441 inches for secure installation.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors on Lexus Highlander, RX350, RX450h, and Toyota Sienna
• Restores smooth braking performance and reduces brake noise
• Addresses rotor thickness below manufacturer specifications
• Helps eliminate vibration or pulsation during braking
• Prevents premature brake pad wear caused by uneven rotor surfaces

Installation Notes and Tips

Ensure the rotor thickness is measured before installation to confirm it meets or exceeds the discard thickness of 0.335 inches. Clean the mounting surface and hub to remove rust or debris for proper rotor seating. Use the specified five mounting bolts tightened to manufacturer torque specifications. Since this rotor does not include an ABS tone ring, verify compatibility with your vehicle’s ABS system before installation.

Quality Assurance and Warranty

Perfect Stop’s Gray Armor-Plate, Premium rotors are manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided, these rotors undergo quality control processes to ensure consistent performance and durability for Lexus and Toyota vehicles. Always consult your vehicle’s service manual for maintenance intervals and replacement guidelines.