Stoptech 128.34080L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.34080L is engineered for BMW models including the 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1. Designed to enhance braking performance, this vented rotor features a cross-drilled surface for improved heat dissipation and consistent stopping power.

• 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
• Precision fit with 5 lug holes and 120 mm bolt circle diameter
• Nominal outside diameter of 336 mm (13.228 inches) and overall height of 67.2 mm (2.646 inches)
• Nominal thickness of 21.9 mm (0.862 inches) with discard thickness at 20.4 mm (0.803 inches)
• Floating disc mounting design with one miscellaneous hole for secure installation
• Weight approximately 8.27 kg (18.2 lbs) for balanced performance

Details on StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to provide enhanced braking performance for sport and performance vehicles. The cross-drilled surface improves heat dissipation and reduces brake fade during aggressive driving or track use. The vented rotor with straight vanes promotes airflow to maintain cooler operating temperatures. The coated hat finish protects against rust and corrosion, ensuring durability over time. This rotor is engineered to meet the precise specifications required by BMW models such as the 330i and 335i series, ensuring reliable fitment and consistent braking feel.

Product Application and Problem Solving

• Improves brake cooling to reduce fade during spirited driving
• Helps maintain consistent braking performance under heavy use
• Reduces rotor warping caused by excessive heat buildup
• Prevents corrosion on the rotor hat for longer service life
• Ensures proper fitment and secure mounting on BMW 330i, 335i, and X1 models

Installation Notes and Tips

• Verify compatibility with your specific BMW model and year before installation
• Ensure rotor thickness is within discard limits (20.4 mm) before reuse
• Use proper torque specifications for the 5 lug bolts on the 120 mm bolt circle
• Inspect brake pads and hardware during rotor replacement for optimal performance
• Clean rotor surface before installation to remove any protective coatings or debris

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed quality assurance to ensure reliable performance and durability when installed correctly.