Stoptech 128.33123R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.33123R) are engineered for Audi vehicles including the A4, A4 Quattro, A5, A5 Quattro, and Q5 models. Designed to enhance braking performance, these rotors feature a vented and cross-drilled surface to improve heat dissipation and reduce brake fade under demanding conditions.

• Cross-drilled surface for improved heat dissipation
• Vented rotor design with pillar-style vanes
• Coated hat finish for corrosion resistance
• Floating disc mounting for thermal expansion
• Compatible with Audi A4, A4 Quattro, A5, A5 Quattro, and Q5
• Nominal thickness: 29.8 mm (1.173 inches)
• Outside diameter: 320 mm (12.598 inches)
• Mounting bolt circle diameter: 112 mm (4.409 inches) with 5 lug holes

Detailed Product Description

The StopTech Sport Cross-Drilled Disc Brake Rotors are precision-engineered vented rotors featuring a cross-drilled surface pattern that enhances cooling efficiency by allowing heat and gases to escape more effectively during braking. The pillar-style vane design promotes airflow between the rotor faces, further reducing operating temperatures. The rotor’s hat is coated to resist corrosion, extending service life and maintaining appearance. These rotors have a floating disc mounting system that accommodates thermal expansion, reducing the risk of warping. With a nominal thickness of 29.8 mm and an outside diameter of 320 mm, these rotors are designed to meet the exact specifications required for Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models. The 5-lug hole pattern with a 112 mm bolt circle diameter ensures proper fitment and secure installation.

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed for drivers seeking enhanced braking performance with reliable heat management. The cross-drilled surface combined with vented construction helps maintain consistent braking under high-stress conditions, such as spirited driving or towing. This product line balances durability and performance, making it suitable for both street and light track use on compatible Audi models.

Common Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves heat dissipation to prevent rotor warping
• Minimizes brake dust buildup on rotor surface
• Enhances braking response and pedal feel
• Resists corrosion with coated hat finish for longer service life

Installation Notes and Tips

• Ensure compatibility with Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models before installation
• Check rotor thickness and discard limits prior to installation
• Use proper torque specifications for the 5-lug mounting bolts
• Inspect brake pads and calipers for wear or damage during rotor replacement
• Perform a bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for fit, form, and function. Each rotor undergoes rigorous testing to ensure durability and performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.