Stoptech 128.44127R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.44127R) are engineered for Lexus 4Runner and Toyota GX470 models. Designed to enhance braking performance, these rotors feature a vented, cross-drilled surface that improves heat dissipation and reduces brake fade under demanding conditions.

• Cross-drilled surface for improved heat dissipation
• Vented rotor design to maintain optimal operating temperatures
• Coated hat finish for corrosion resistance
• Floating disc mounting for better rotor alignment
• Compatible with Lexus 4Runner and Toyota GX470
• Overall diameter: 338 mm (13.307 inches)
• Nominal thickness: 27.5 mm (1.083 inches)
• Discard thickness: 26 mm (1.024 inches)
• 6 lug holes with 5.5 inch bolt circle diameter

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to provide enhanced braking performance through advanced rotor surface technology. The cross-drilled pattern helps to evacuate gases and debris from the braking surface, while the vented design promotes consistent cooling. This product line is suitable for drivers seeking improved brake response and durability on vehicles such as the Lexus 4Runner and Toyota GX470.

Technical Specifications and Features

These rotors have a nominal thickness of 27.5 mm and a discard thickness of 26 mm, ensuring a long service life before replacement is necessary. The overall height measures 67.4 mm, and the outside diameter is 338 mm, matching OEM specifications for proper fitment. The rotors feature a coated hat finish to resist corrosion and maintain structural integrity. The floating disc mounting system allows for slight movement to reduce stress and improve braking consistency. The rotor includes six lug holes with a 5.5 inch bolt circle diameter and a center hole diameter of 108 mm, ensuring compatibility with the specified vehicle models.

Applications and Problem Solving

• Reduces brake fade during extended or aggressive braking
• Improves heat dissipation to prevent rotor warping
• Enhances braking response and pedal feel
• Resists corrosion with coated hat finish for longer rotor life
• Compatible with Lexus 4Runner and Toyota GX470 requiring vented, cross-drilled rotors

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 26 mm before installation. The floating disc mounting requires proper alignment to avoid uneven wear. This rotor does not include ABS tone rings or bearings, so verify compatibility with your vehicle’s braking system. Use appropriate torque specifications for the 6 lug bolts on the 5.5 inch bolt circle diameter. Clean the rotor surface before installation to remove any protective coatings or contaminants.

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided, StopTech products typically undergo rigorous quality control to ensure reliability and performance on Lexus 4Runner and Toyota GX470 vehicles.