Stoptech 127.42078L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.42078L) is engineered for enhanced braking performance on select Infiniti and Nissan vehicles. Designed to improve heat dissipation and reduce brake fade, this rotor is ideal for drivers seeking reliable stopping power and consistent pedal feel.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design to enhance cooling during heavy braking
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with multiple Infiniti and Nissan models including FX35, Q50, Murano, and Pathfinder
• Precision fit with 5 lug holes and a 114.3 mm bolt circle diameter

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 precision slots. This design improves brake pad bite and helps evacuate gases and dust generated during braking. The vented rotor construction further aids in heat management, making these rotors suitable for spirited driving and heavier vehicles like the Infiniti QX70 and Nissan Pathfinder.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 0.630 inches (16.0 mm) and a discard thickness of 0.551 inches (14.0 mm), ensuring durability and longevity under demanding conditions. The rotor’s outside diameter measures 12.110 inches (307.6 mm), with an overall height of 2.445 inches (62.1 mm). It includes a 5-lug hole pattern with a 0.504 inch (12.8 mm) diameter for secure mounting. The rotor is vented with straight vanes to optimize airflow and cooling. The hat section is coated to resist corrosion, maintaining structural integrity over time. Note that this rotor does not include ABS tone rings or bearings.

Compatible Vehicles

• Infiniti FX35, FX37, FX45
• Infiniti JX35, M35h, M37, M56
• Infiniti Murano, Q50, Q60, Q70, Q70L
• Infiniti Quest, QX60, QX70
• Nissan Pathfinder

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Uneven brake pad wear due to poor rotor surface design
• Corrosion and rust on rotor hats reducing lifespan
• Reduced braking performance from gas and dust accumulation on rotor surface
• Overheating in vented rotors leading to warping or cracking

Installation Notes and Tips

• Ensure rotor discard thickness is not exceeded before installation
• Clean mounting surfaces to prevent rotor runout and vibration
• Use proper torque specifications for lug nuts to avoid rotor damage
• Check compatibility with vehicle ABS systems as this rotor does not include an ABS tone ring
• Inspect brake pads for wear and replace if necessary when installing new rotors

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications 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 verify warranty terms with the product supplier or manufacturer.