Stoptech 127.44175L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.44175L) are engineered for Lexus and Toyota vehicles, including the 4Runner, FJ Cruiser, and GX460. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface for improved heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for better heat and gas dissipation
• Vented rotor design to reduce brake fade
• Coated hat finish for corrosion resistance
• Compatible with Lexus and Toyota 4Runner, FJ Cruiser, and GX460 models
• Disc mounting type: Floating / Dih
• Outside diameter: 312.1 mm (12.287 in)
• Nominal thickness: 18.0 mm (0.709 in)
• Discard thickness: 16.0 mm (0.630 in)
• 6 lug holes with 14.4 mm diameter

Product Line Details: StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved rotor cooling and pad bite. The combination of cross-drilled holes and precision slots helps to evacuate heat, brake dust, and gases generated during braking. This product line is ideal for drivers seeking reliable stopping power and rotor durability on Lexus and Toyota SUVs such as the 4Runner, FJ Cruiser, and GX460.

Technical Specifications and Features

These rotors feature a vented design with straight vanes to optimize airflow and reduce heat buildup during heavy braking. The coated hat finish protects against corrosion, extending rotor life. The rotor measures 312.1 mm in outside diameter with a nominal thickness of 18.0 mm and a discard thickness of 16.0 mm, ensuring compliance with manufacturer specifications. The 6-lug hole pattern with a 139.7 mm bolt circle diameter and 14.4 mm lug hole diameter matches factory fitment for the specified Lexus and Toyota models. The floating disc mounting style allows for slight rotor movement, which can improve pad contact and reduce noise.

Common Applications and Problem Solving

• Improves braking performance on Lexus 4Runner, Toyota FJ Cruiser, and GX460
• Reduces brake fade during extended or aggressive driving
• Minimizes rotor warping caused by excessive heat
• Helps prevent brake dust buildup and glazing on pads
• Restores proper rotor thickness and surface condition for safe braking

Installation Notes and Tips

• Ensure rotor discard thickness is not exceeded before installation
• Clean rotor surface to remove any protective coatings before mounting
• Check compatibility with existing brake pads and calipers
• Torque lug nuts to manufacturer specifications for proper fitment
• Inspect wheel bearings and hub assembly during installation

Quality Assurance and Warranty

StopTech 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 here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.