Stoptech 127.34080R Disc Brake Rotor - Rear Right

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34080R) are engineered for BMW models including the 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface for improved heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for enhanced cooling and debris removal
• Vented rotor design to reduce heat buildup during braking
• Coated hat finish to resist corrosion and extend rotor life
• Precision fit with 5 lug holes and 120 mm bolt circle diameter
• Compatible with BMW 330i, 335i, X1, and related models
• Nominal thickness of 21.9 mm and discard thickness of 20.4 mm
• Overall diameter of 336 mm (13.228 inches) for exact fitment

Detailed Product Description and Specifications

This StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (127.34080R) is a vented rotor featuring a straight vane design that promotes efficient airflow to reduce brake fade. The rotor’s surface is both slotted and cross-drilled, which helps to evacuate gases, dust, and water from the braking surface, improving pad bite and overall braking consistency. The coated hat finish provides corrosion resistance, maintaining the rotor’s integrity over time. With an overall height of 67.2 mm and a center hole diameter of 75 mm, this rotor is engineered for precise fitment on compatible BMW vehicles. The rotor weighs approximately 8.27 kg (18.2 lbs), balancing durability and performance.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to offer enhanced braking performance for street and light track use. This product line focuses on improving heat dissipation and brake pad cleaning through its cross-drilled and slotted rotor surface. These rotors are vented to further reduce heat buildup, which helps maintain consistent braking performance under demanding conditions. The 127.34080R rotor is part of this line, providing a reliable upgrade for BMW 3 Series and X1 models requiring precise fitment and improved brake response.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves braking performance in wet or dusty conditions
• Minimizes rotor warping caused by excessive heat
• Enhances pad bite and reduces brake dust buildup
• Prevents corrosion on the rotor hat for longer service life

Installation Notes and Tips

• Ensure compatibility with BMW 330i, 335i, 335d, 335is, 330xi, 335xi, 335i xDrive, and X1 models
• Check rotor discard thickness (20.4 mm) before installation to confirm rotor usability
• Use proper torque specifications for the 5 lug bolts on the 120 mm bolt circle
• Inspect brake pads and calipers during installation for optimal performance
• Follow manufacturer’s break-in procedure after installation for best results

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The 127.34080R rotor undergoes strict quality control processes to maintain consistent thickness, balance, and surface finish. 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.