Stoptech 127.34048R Disc Brake Rotor - Front Right

Overview of StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.34048R) is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. Designed to enhance braking performance, this rotor features a vented, slotted, and cross-drilled surface to improve heat dissipation and maintain consistent stopping power.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design to reduce brake fade
• Coated hat finish for corrosion resistance
• Floating disc mounting for better thermal expansion management
• Compatible with 5-lug wheel setups on specified BMW models
• Overall diameter of 300 mm (11.811 inches) and nominal thickness of 22 mm (0.866 inches)

Detailed Product Features and Specifications

This StopTech rotor is constructed with a vented design featuring straight vanes that promote airflow and cooling during braking. The cross-drilled and slotted surface helps to evacuate brake dust, gases, and water, which can improve pad bite and reduce the risk of brake fade under demanding conditions. The rotor’s coated hat finish provides protection against corrosion, extending the service life of the part. 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 designed to fit precisely on the specified BMW models. The floating disc mounting system allows for slight movement between the rotor and hub, accommodating thermal expansion and reducing the risk of warping.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is developed to offer enhanced braking performance for street and light track use. This product line focuses on improving heat dissipation and maintaining consistent brake pad contact through its cross-drilled and slotted design. The vented rotor construction and coated hat finish contribute to durability and corrosion resistance, making it suitable for BMW vehicles that require reliable stopping power under varied driving conditions.

Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves braking response in wet or humid conditions
• Minimizes brake dust buildup on rotor surface
• Prevents rotor warping caused by thermal stress
• Enhances overall brake system longevity and reliability

Installation Notes and Tips

Ensure compatibility with your BMW model (323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, Z4) before installation. The rotor requires a 5-lug wheel setup with a 120 mm bolt circle diameter. Use proper torque specifications when mounting the rotor to avoid distortion. It is recommended to replace brake pads simultaneously to ensure optimal performance. Verify that the ABS tone ring is not required, as this rotor does not include one.

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. Consult the product documentation or manufacturer for exact warranty terms.