Stoptech 127.33123L 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 127.33123L) are engineered for Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface to improve heat dissipation and maintain consistent stopping power under demanding conditions.

• Compatible with Audi A4, A4 Quattro, A5, A5 Quattro, and Q5
• Part Number: 127.33123L
• Vented disc design with pillar-style vanes for efficient cooling
• Cross-drilled and slotted surface for improved brake pad bite and debris removal
• Coated hat finish to resist corrosion
• Floating disc mounting for better thermal expansion management
• Outside diameter: 320 mm (12.598 inches)
• Nominal thickness: 29.8 mm (1.173 inches), discard thickness: 28 mm (1.102 inches)
• 5 lug holes with 112 mm bolt circle diameter
• Weight approximately 9.86 kg (21.7 lbs)

Detailed Product Description

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are designed to meet the specific braking demands of Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 vehicles. Featuring a vented rotor design with pillar-style vanes, these rotors promote efficient airflow to reduce heat buildup during braking. The cross-drilled and slotted surface enhances pad bite and helps evacuate gases, dust, and water, contributing to consistent brake performance. The coated hat finish provides corrosion resistance, extending rotor life. The floating disc mounting system allows for thermal expansion, reducing the risk of warping under high-stress conditions. With precise fitment specifications including a 320 mm outside diameter, 5 lug holes on a 112 mm bolt circle, and a nominal thickness of 29.8 mm, these rotors are engineered for direct replacement on compatible Audi models.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed for drivers seeking improved braking performance and durability. This product line combines cross-drilled holes and precision slots to optimize heat dissipation and maintain pad contact, which is essential for spirited driving and daily use. The vented rotor design with pillar vanes further enhances cooling efficiency, making these rotors suitable for both street and light track applications. The coated hat finish helps protect against corrosion, ensuring longevity and reliable performance over time.

Common Applications and Problem Solving

• Reduces brake fade caused by excessive heat buildup
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust accumulation for cleaner braking components
• Prevents rotor warping through effective thermal management
• Enhances brake pad bite and overall stopping power

Installation Notes and Tips

• Ensure compatibility with Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models before installation
• Check rotor thickness and discard thickness to confirm suitability for your vehicle
• Use proper torque specifications for the 5 lug bolts on the 112 mm bolt circle
• Inspect brake pads and replace if worn to maximize rotor performance
• Follow manufacturer guidelines for bedding-in new rotors and pads

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The rotors undergo rigorous testing for material integrity and dimensional accuracy. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. It is recommended to consult the product documentation or StopTech directly for complete warranty information.