Stoptech 127.34029R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34029R) are engineered for BMW models including the 318i, 318is, 318ti, 320i, 323Ci, 323i, 323is, 325i, 325is, 328i, 328is, Z3, and Z4. These rotors provide enhanced braking performance through a vented, cross-drilled, and slotted design that improves heat dissipation and reduces brake fade.

• Cross-drilled and slotted surface for improved cooling and debris removal
• Vented rotor design with straight vane style for efficient heat dissipation
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting with 5 lug holes and 120mm bolt circle diameter
• Compatible with BMW 3 Series and Z models listed in fitment

Detailed Product Features and Specifications

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors feature a nominal thickness of 0.862 inches (21.9 mm) and a discard thickness of 0.803 inches (20.4 mm), ensuring durability and longevity under demanding conditions. The rotor has an outside diameter of 11.26 inches (286 mm) and an overall height of 2.035 inches (51.7 mm). The vented design incorporates straight vanes to optimize airflow and cooling during braking. The rotor’s hat is coated to protect against rust and corrosion, maintaining structural integrity over time. This rotor does not include ABS tone rings or bearings and mounts using a floating disc system with a center hole diameter of 3.11 inches (79 mm).

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking performance for street and light track use. The combination of cross-drilled holes and precision slots helps to evacuate gases, dust, and water from the rotor surface, improving pad contact and reducing brake fade. This product line focuses on delivering consistent braking performance and improved rotor cooling, making it suitable for BMW vehicles requiring reliable and responsive braking components.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or extended braking
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust buildup for cleaner rotor and pad contact
• Helps prevent rotor warping caused by excessive heat
• Restores braking performance on BMW 3 Series and Z models with worn or damaged rotors

Installation Notes and Tips

• Ensure compatibility with your specific BMW model and verify part number 127.34029R before installation
• Inspect brake pads and replace if worn to maintain optimal rotor performance
• Follow manufacturer torque specifications for mounting bolts on the 5-lug, 120mm bolt circle
• Check for proper rotor thickness and discard limits during installation
• Bleed brake system after installation to ensure proper brake function

Quality Assurance and Warranty

StopTech 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.