Stoptech 127.34054L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34054L) are engineered for BMW M3 and M5 models, providing reliable braking performance with enhanced heat dissipation. Designed with a vented rotor structure and a coated hat finish, these rotors offer durability and consistent stopping power under demanding conditions.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design to reduce brake fade during extended use
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with BMW M3 and M5 models
• Nominal thickness of 20.000 mm and discard thickness of 18.400 mm
• Overall diameter of 327.000 mm and overall height of 61.700 mm
• Five lug holes with a 120.000 mm bolt circle diameter
• Weight approximately 17.07 lbs (7.76 kgs)

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking performance by combining cross-drilled holes and precision slots. This design improves cooling efficiency and helps evacuate gases and debris from the rotor surface, which is critical for maintaining consistent brake pad contact. The vented rotor construction further aids in heat management, making this product line suitable for both street and light track use. The coated hat finish provides additional protection against corrosion, ensuring longevity and reliable performance.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 20.000 mm with a discard thickness of 18.400 mm, ensuring safe replacement intervals. The rotor’s outside diameter measures 327.000 mm, with an overall height of 61.700 mm. It includes five stud/lug holes with a diameter of 14.600 mm arranged on a 120.000 mm bolt circle diameter. The center hole diameter is 75.000 mm, and the rotor is designed with two miscellaneous holes and straight vane style for optimal airflow. The rotor is vented to improve cooling and reduce brake fade during aggressive driving.

Applications and Problem Solving

• Reduces brake fade caused by excessive heat buildup during spirited driving
• Improves braking consistency by evacuating gases and debris from the rotor surface
• Helps prevent corrosion with a coated hat finish for longer service life
• Compatible with BMW M3 and M5 models requiring high-performance rotors
• Supports safe replacement with clear discard thickness specifications

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (18.400 mm) before installation
• Clean rotor surface to remove any protective coatings or contaminants prior to mounting
• Verify compatibility with BMW M3 and M5 models using part number 127.34054L
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Inspect brake pads and calipers during installation for optimal braking system performance

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The rotors undergo rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.