Stoptech 128.34048L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.34048L is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. Designed to provide consistent braking performance, this vented rotor features a cross-drilled surface for improved heat dissipation and reduced brake fade.

• Cross-drilled surface type for enhanced cooling
• Vented rotor design to maintain optimal temperature
• Coated hat finish for corrosion resistance
• Floating disc mounting for improved rotor alignment
• Compatible with BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4
• Part number 128.34048L for precise fitment
• Overall diameter of 300 mm (11.811 inches)
• Nominal thickness of 22.000 mm (0.866 inches)
• Mounting bolt hole circle diameter of 120 mm (4.724 inches) with 5 lug holes

Detailed Product Features and Specifications

The StopTech Sport Cross-Drilled Disc Brake Rotors are designed with a vented rotor type that uses straight vanes to optimize airflow and heat dissipation during braking. The cross-drilled surface pattern helps to reduce brake fade by allowing gases and heat to escape more efficiently. The rotor features a coated hat finish to protect against corrosion and extend service life. With an overall height of 51.5 mm (2.028 inches) and a center hole diameter of 79 mm (3.110 inches), this rotor is engineered for precise fitment on compatible BMW models. The floating disc mounting system enhances rotor alignment and reduces the risk of warping under heavy braking conditions. Weighing approximately 6.88 kg (15.14 lbs), this rotor balances durability and performance.

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on delivering enhanced braking performance through advanced rotor designs such as cross-drilling and venting. This product line is tailored for drivers seeking improved heat management and consistent stopping power in demanding driving conditions. The 128.34048L rotor exemplifies these qualities with its vented construction and coated finish, making it suitable for BMW vehicles requiring reliable and durable braking components.

Applications and Problem Solving

• Reduces brake fade during aggressive or prolonged braking
• Improves heat dissipation to prevent rotor warping
• Minimizes corrosion with coated hat finish
• Enhances braking consistency for BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 models
• Provides precise fitment to avoid installation issues

Installation Notes and Tips

• Ensure compatibility with BMW models 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 before installation
• Check rotor thickness and discard thickness limits (nominal thickness 22.000 mm, discard thickness 20.400 mm) to maintain safety standards
• Use proper torque specifications for the 5 lug holes with 14.6 mm diameter studs
• Inspect brake pads and calipers during rotor replacement for optimal performance
• Floating disc mounting requires careful alignment to prevent uneven wear

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The coated hat finish provides corrosion resistance, extending the rotor's service life. While specific warranty details are not provided, StopTech products typically adhere to industry standards for material and workmanship quality, ensuring reliable braking performance for BMW vehicles equipped with part number 128.34048L.