Stoptech 127.44129L 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 127.44129L) is engineered for Toyota 4Runner, FJ Cruiser, and Tacoma models. Designed to enhance braking performance, this vented rotor features a slotted and cross-drilled surface to improve heat dissipation and maintain consistent stopping power under demanding conditions.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design with straight vane style for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with Toyota 4Runner, FJ Cruiser, and Tacoma models
• Overall diameter: 12.559 inches (319 mm)
• Nominal thickness: 1.102 inches (28 mm) with discard thickness at 1.024 inches (26 mm)
• 6 lug holes with 0.571 inch (14.5 mm) diameter and 5.5 inch (139.7 mm) bolt circle diameter

Detailed Product Description

This StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor is specifically designed for Toyota 4Runner, FJ Cruiser, and Tacoma vehicles requiring reliable braking performance. The rotor’s vented construction with straight vanes promotes effective airflow, reducing heat buildup during heavy braking. The cross-drilled and slotted surface helps evacuate brake dust, gases, and water, which can improve pad bite and reduce brake fade. The coated hat finish protects against rust and corrosion, maintaining rotor integrity over time. With a floating disc mounting system, this rotor allows slight movement to reduce stress and minimize warping, contributing to longer service life.

Common Applications and Problem Solving

• Reduces brake fade during off-road or heavy towing conditions
• Improves braking response in wet or dusty environments
• Minimizes rotor warping and vibration under high thermal stress
• Enhances pad cleaning to maintain consistent braking performance
• Prevents premature rotor corrosion and surface degradation

Installation Notes and Tips

• Ensure compatibility with Toyota 4Runner, FJ Cruiser, or Tacoma models before installation
• Check rotor thickness and discard limits (nominal thickness 1.102 inches, discard at 1.024 inches) to confirm rotor serviceability
• Use proper torque specifications for the 6 lug bolts (bolt circle diameter 5.5 inches)
• 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 strict quality standards, ensuring durability and consistent braking performance. The coated hat finish and vented design contribute to long-term reliability. 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 or authorized distributors for exact warranty terms.