Stoptech 128.44127L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.44127L is engineered for Lexus 4Runner and Toyota GX470 models. Designed to enhance braking performance, this vented rotor features a cross-drilled surface and a coated hat finish for durability and heat dissipation.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design with straight vane style for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Nominal outside diameter of 338 mm (13.307 inches) for precise fitment
• Floating disc mounting for better rotor alignment and performance
• Compatible with 6 lug/stud holes, 14.5 mm diameter, and 139.7 mm bolt circle diameter
• Nominal thickness of 27.5 mm with discard thickness at 26 mm for safe replacement limits

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat management and rotor durability. The cross-drilled surface pattern helps dissipate heat and gases generated during braking, reducing the risk of brake fade under demanding conditions. This rotor line features vented construction with straight vanes to maintain optimal operating temperatures, making it suitable for both daily driving and spirited use on Lexus 4Runner and Toyota GX470 vehicles.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 27.5 mm and a discard thickness of 26 mm, ensuring a clear service life window. The rotor’s overall height measures 67.4 mm, with a center hole diameter of 108 mm, matching OEM specifications for proper fitment. The rotor weighs approximately 20.5 lbs (9.32 kg), balancing strength and weight for consistent braking feel. The floating disc mounting system allows for slight movement to reduce stress and improve rotor longevity. The coated hat finish protects against corrosion, maintaining rotor integrity over time.

Compatible Vehicles and Applications

• Replacement rotor for Lexus 4Runner models requiring part number 128.44127L
• Compatible with Toyota GX470 vehicles needing cross-drilled vented rotors
• Ideal for drivers seeking improved brake cooling and fade resistance
• Suitable for on-road and light off-road use where reliable braking is essential

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (26 mm) before installation
• Verify compatibility with vehicle lug pattern: 6 studs, 14.5 mm diameter
• Use proper torque specifications for mounting bolts to avoid rotor warping
• Inspect brake pads and calipers during installation for optimal performance

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 finish and vented design contribute to long-term durability and consistent braking performance. While specific warranty details are not provided, StopTech products typically come with manufacturer-backed quality assurance to support reliable operation on Lexus 4Runner and Toyota GX470 vehicles.