Stoptech 127.42092L 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 127.42092L) is engineered for INFINITI FX35, FX37, FX45, and QX70 models. Designed to enhance braking performance, this vented rotor features a coated hat finish and a floating disc mounting system for improved heat dissipation and durability.

• Cross-drilled and slotted surface for efficient heat and gas dissipation
• Vented rotor design with straight vane style for optimal cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for reduced stress and improved performance
• Compatible with INFINITI FX35, FX37, FX45, and QX70 models
• Nominal thickness of 1.339 inches (34.000 mm) with discard thickness at 1.260 inches (32.000 mm)
• Outside diameter of 12.598 inches (320.000 mm) and overall height of 1.937 inches (49.200 mm)
• 5 lug holes with 0.500 inch (12.700 mm) diameter and 4.500 inch (114.300 mm) bolt circle diameter

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat management and surface friction. The combination of cross-drilled holes and precision slots helps to evacuate gases, dust, and water from the rotor surface, reducing brake fade and maintaining consistent stopping power. This product line is ideal for drivers seeking reliable performance upgrades for their INFINITI FX and QX series vehicles.

Product Details and Specifications

This disc brake rotor features a vented design with straight vanes that promote airflow to cool the rotor during heavy braking. The coated hat finish protects against rust and corrosion, ensuring longevity. The rotor’s floating disc mounting system allows for slight movement between the rotor and hat, reducing stress and improving thermal expansion management. With a nominal thickness of 1.339 inches and a discard thickness of 1.260 inches, this rotor maintains structural integrity under demanding conditions. The rotor measures 12.598 inches in diameter and 1.937 inches in overall height, fitting securely on the specified INFINITI models with a 5-lug pattern and 4.500 inch bolt circle diameter.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Enhances wet weather braking performance by channeling water away
• Minimizes brake dust buildup for cleaner braking surfaces
• Provides consistent pedal feel and stopping power under varied conditions

Installation Notes and Tips

• Ensure compatibility with INFINITI FX35, FX37, FX45, and QX70 models before installation
• Check rotor thickness and discard limits regularly to maintain safety
• Use proper torque specifications for lug nuts to avoid rotor damage
• Inspect brake pads and hardware during rotor replacement for optimal performance
• Follow manufacturer guidelines for bedding-in new rotors and pads

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The 127.42092L rotor undergoes rigorous quality control to ensure durability and performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or StopTech directly for complete warranty information.