Stoptech 128.33039L Disc Brake Rotor - Front Left

Overview of StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.33039L is engineered for Audi and Volkswagen vehicles, including models such as the A4, A6, Passat, and their Quattro variants. Designed to enhance braking performance, this vented rotor features a coated hat finish and cross-drilled surface for improved heat dissipation.

• Cross-drilled surface type for efficient heat and gas dissipation
• Vented rotor design with straight vane style for optimal cooling
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with Audi and Volkswagen models including A4, A6, Passat, and Quattro versions
• Floating disc mounting for improved rotor alignment and performance
• Disc dimensions: 288 mm outside diameter, 25 mm nominal thickness
• Mounting bolt circle diameter of 112 mm with 5 lug holes

Detailed Product Description

The StopTech Sport Cross-Drilled Disc Brake Rotors are designed to meet the demands of drivers seeking reliable braking performance on Audi and Volkswagen vehicles. The part number 128.33039L specifies a rotor with a 288 mm outside diameter and a nominal thickness of 25 mm, ensuring compatibility with models such as the Audi A4, A6, and Passat, including their Quattro all-wheel-drive versions. The rotor features a vented design with straight vanes that promote airflow to reduce heat buildup during braking. The cross-drilled surface enhances gas and dust evacuation, which helps maintain consistent brake pad contact and reduces the risk of brake fade under heavy use.

The rotor’s coated hat finish provides corrosion resistance, protecting the rotor’s structural integrity over time. The floating disc mounting system allows for slight movement between the rotor and hub, which can improve braking feel and reduce stress on the braking components. With a mounting bolt circle diameter of 112 mm and five lug holes, this rotor fits securely on the specified Audi and Volkswagen models.

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on performance-oriented rotors that combine vented and cross-drilled designs to optimize heat dissipation and braking consistency. This product line is engineered to provide enhanced cooling and reduced brake fade for street and light track use, making it suitable for drivers who require dependable braking performance on vehicles like the Audi A4 Quattro and Volkswagen Passat. The 128.33039L rotor exemplifies these characteristics with its vented hat and cross-drilled surface.

Common Applications and Problem Solving

• Reduces brake fade during aggressive or prolonged braking
• Improves heat dissipation to prevent rotor warping
• Minimizes gas and dust buildup between pad and rotor
• Enhances braking consistency in wet or dry conditions
• Protects against corrosion with coated hat finish

Installation Notes and Tips

• Ensure compatibility with Audi and Volkswagen models listed, including A4, A6, Passat, and Quattro variants
• Check rotor thickness before installation; discard thickness is 23 mm
• Use proper torque specifications for the 5 lug bolts on the 112 mm bolt circle
• Inspect brake pads and hardware for wear during rotor replacement
• Follow manufacturer guidelines for bedding-in new rotors

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The rotors undergo precision machining and coating processes to ensure consistent dimensions and corrosion resistance. 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.