Stoptech 127.34093L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.34093L) is engineered for BMW models including the 335d, 335i, 335is, 335i xDrive, 335xi, and X1. Designed to enhance braking performance, this rotor features a vented, floating design with cross-drilled and slotted surfaces to improve heat dissipation and reduce brake fade.

• Cross-drilled and slotted surface for improved cooling and debris removal
• Vented rotor design to enhance heat dissipation
• Coated hat finish for corrosion resistance
• Floating disc mounting for better thermal expansion management
• Compatible with BMW 335d, 335i, 335is, 335i xDrive, 335xi, and X1 models
• Part Number: 127.34093L

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide consistent braking performance under demanding conditions. Featuring a combination of cross-drilled holes and precision slots, these rotors help maintain optimal pad contact and reduce the risk of brake fade caused by heat buildup. The vented rotor design further aids in cooling, while the coated hat finish protects against corrosion, extending rotor life. This product line is suitable for drivers seeking reliable braking performance on BMW vehicles such as the 335 series and X1.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.177 inches (29.9 mm) and a discard thickness of 1.118 inches (28.4 mm), ensuring a durable lifespan before replacement is necessary. The rotor's outside diameter measures 13.701 inches (348 mm), with an overall height of 2.886 inches (73.3 mm). It features a 5-lug stud pattern with a mounting bolt hole circle diameter of 120 mm (4.724 inches) and a center hole diameter of 3.106 inches (78.9 mm). The rotor weighs approximately 24.2 lbs (11 kg) and includes a straight vane style for efficient airflow. Note that this rotor does not include ABS tone rings or bearings.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or track use
• Improves heat dissipation to prevent rotor warping
• Helps remove brake dust and debris for consistent pad contact
• Minimizes corrosion with coated hat finish
• Supports enhanced braking performance on BMW 335i and X1 models

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Use proper torque specifications for the 5-lug mounting pattern
• Check compatibility with your specific BMW model and brake system
• Inspect brake pads and replace if worn to maximize rotor performance
• Floating disc mounting requires correct alignment for optimal function

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM specifications 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 a limited warranty against defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.