Stoptech 127.42120L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.42120L) are engineered for enhanced braking performance on select INFINITI and Nissan vehicles. Designed to improve heat dissipation and reduce brake fade, these rotors are an ideal upgrade for models such as the Nissan 370Z, Murano, Pathfinder, and INFINITI Q50 and Q60.

• Cross-drilled and slotted surface for improved cooling and debris removal
• Vented rotor design to enhance heat dissipation
• Coated hat finish to resist corrosion
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with 5-lug wheel configurations
• Precision dimensions: 319.8 mm outside diameter, 28.0 mm nominal thickness

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on performance-oriented rotors that combine cross-drilled holes and slots to optimize braking efficiency. This design helps maintain consistent brake pad contact, reduces gas buildup, and improves water dispersion. The vented rotor construction further aids in heat management, making these rotors suitable for spirited driving and daily use on compatible INFINITI and Nissan models.

Technical Specifications and Features

These rotors feature a vented design with straight vanes to maximize airflow and cooling. The cross-drilled and slotted surface enhances pad bite and helps clear brake dust and gases, contributing to consistent braking performance. The coated hat finish protects against rust and corrosion, extending rotor life. With a floating disc mounting system, the rotor allows slight movement to reduce stress and minimize warping under heavy braking conditions. Key dimensions include a 319.8 mm outside diameter, 28.0 mm nominal thickness, and a 114.3 mm bolt circle diameter with 5 lug holes sized at 12.6 mm diameter.

Compatible Vehicles and Applications

• INFINITI Q50, Q60, QX50, QX60, and Z models
• Nissan 370Z, JX35, Murano, Pathfinder
• Designed for vehicles requiring a 5-lug, 114.3 mm bolt pattern rotor
• Ideal for drivers seeking improved braking response and heat management

Installation Notes and Tips

• Ensure rotor discard thickness of 26.0 mm is not exceeded before replacement
• Verify compatibility with vehicle ABS system; this rotor does not include an ABS tone ring
• Use proper torque specifications on lug nuts to avoid rotor warping
• Inspect brake pads and calipers during installation for optimal performance
• Professional installation is recommended for precise fitment and safety

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM standards for durability and performance. The coated hat finish provides corrosion resistance to extend service life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against manufacturing defects. Consult the product packaging or StopTech directly for exact warranty terms.