Stoptech 127.40090R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.40090R) are engineered for Acura MDX and TLX models, providing reliable braking performance with enhanced heat dissipation. These rotors feature a vented design with cross-drilled and slotted surfaces to improve stopping power and reduce brake fade under demanding conditions.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design with 44 straight vanes for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced stress
• Compatible with Acura MDX and TLX models
• Nominal thickness of 1.102 inches (28.000 mm) and discard thickness of 1.024 inches (26.000 mm)
• Outside diameter of 12.598 inches (320.000 mm) and overall height of 1.854 inches (47.100 mm)
• 5 lug holes with a 4.496 inch (114.200 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 enhance braking performance by combining cross-drilled holes and precision slots. This design improves pad bite and helps evacuate gases, dust, and water from the rotor surface. The vented construction with straight vanes promotes consistent cooling, making these rotors suitable for both street and light track use. The coated hat finish adds corrosion resistance, maintaining rotor integrity over time.

Technical Details and Specifications

This disc brake rotor features a vented design with 44 straight vanes to optimize airflow and heat dissipation. The rotor’s nominal thickness is 1.102 inches (28.000 mm), with a discard thickness of 1.024 inches (26.000 mm), ensuring safe and effective braking performance throughout its service life. The rotor measures 12.598 inches (320.000 mm) in outside diameter and has an overall height of 1.854 inches (47.100 mm). It includes a floating disc mounting system to reduce stress and improve alignment during operation. The hat is coated to resist corrosion, and the rotor has 5 lug holes with a 4.496 inch (114.200 mm) bolt circle diameter, compatible with Acura MDX and TLX vehicles.

Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Enhances braking response and pad bite with slotted and drilled surfaces
• Helps remove water and debris for consistent braking in wet conditions
• Resists corrosion with coated hat finish for longer service life

Installation Notes and Tips

• Ensure compatibility with Acura MDX and TLX models before installation
• Check rotor thickness and discard limits to maintain safety standards
• Use proper torque specifications for lug nuts to avoid rotor damage
• Inspect brake pads and calipers during rotor replacement for optimal performance
• Follow manufacturer guidelines for bedding-in new rotors and pads

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 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’s official documentation for complete warranty information.