Stoptech 127.44122L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.44122L) is engineered for Lexus LS430 models requiring reliable braking performance. Designed with vented construction and a coated hat finish, this rotor balances heat dissipation and corrosion resistance for consistent stopping power.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design to reduce brake fade under heavy use
• Coated hat finish to protect against corrosion
• Floating disc mounting for enhanced rotor alignment and performance
• Compatible with Lexus LS430 brake systems requiring 315mm diameter rotors

Detailed Product Features and Specifications

This disc brake rotor features a 12.402 inch (315 mm) outside diameter and a nominal thickness of 1.181 inches (30 mm), with a discard thickness of 1.102 inches (28 mm). The overall height measures 1.980 inches (50.3 mm), and the rotor includes a 5-lug pattern with a 4.5 inch (114.3 mm) bolt circle diameter. The center hole diameter is 2.441 inches (62 mm), designed for precise fitment on the Lexus LS430. The rotor is vented with straight vanes to optimize airflow and cooling during braking. The surface is cross-drilled and slotted to help evacuate gases, dust, and water, improving brake pad contact and reducing fade. This rotor does not include ABS tone rings or bearings and weighs approximately 21.25 lbs (9.66 kg).

About the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking performance through advanced rotor surface technology. The combination of cross-drilled holes and precision slots improves heat dissipation and helps maintain clean pad surfaces, which is critical for consistent braking in demanding driving conditions. The vented rotor design further supports thermal management, making this product line suitable for drivers seeking improved brake response and durability on vehicles like the Lexus LS430.

Common Applications and Problem Solving

• Reduces brake fade during extended or aggressive braking
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust buildup for cleaner braking components
• Helps maintain consistent brake pad contact and performance
• Prevents rotor warping caused by excessive heat buildup

Installation Notes and Tips

• Ensure compatibility with Lexus LS430 brake system specifications before installation
• Inspect calipers and pads for wear and replace if necessary during rotor installation
• Torque mounting bolts to manufacturer specifications to avoid rotor misalignment
• Perform a proper bed-in procedure after installation to optimize rotor and pad performance
• Check for ABS sensor clearance as this rotor does not include an ABS tone ring

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The rotors undergo rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Refer to StopTech or authorized distributors for complete warranty information.