Stoptech 127.34032R Disc Brake Rotor - Rear Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.34032R) is engineered for BMW models including the 740i, 740iL, 840Ci, 850Ci, 850CSi, and 850i. Designed to enhance braking performance, this rotor features a solid construction with a coated hat finish for durability and corrosion resistance.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Solid rotor design with a nominal thickness of 11.900 mm (0.469 inches)
• Coated hat finish to resist rust and extend rotor life
• Outside diameter of 324 mm (12.756 inches) for precise fitment
• Five lug holes with a 120 mm (4.724 inches) bolt circle diameter
• Center hole diameter of 75 mm (2.953 inches) for accurate mounting
• Weight approximately 6.8 kg (14.97 lbs) per rotor

Detailed Product Description

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are designed to provide consistent braking performance under demanding conditions. The cross-drilled holes and slots help to reduce brake fade by allowing heat and gases to escape more efficiently during braking. This design also aids in removing debris and water from the rotor surface, improving pad contact and overall stopping power. The rotor is solid rather than vented, which suits specific BMW applications where solid rotors are required. The coated hat finish protects the rotor from corrosion, maintaining structural integrity and appearance over time.

Compatible BMW Models and Applications

This rotor is compatible with the following BMW models: 740i, 740iL, 840Ci, 850Ci, 850CSi, and 850i. It is specifically designed to meet the OEM specifications for these vehicles, ensuring proper fit and function. The part number 127.34032R should be referenced to confirm compatibility when replacing front or rear disc brake rotors on these models.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on delivering enhanced braking performance through advanced rotor surface technology. The combination of cross-drilled holes and precision slots improves heat dissipation and pad bite, which is critical for sporty driving and high-performance applications. This product line is engineered to provide reliable stopping power while maintaining rotor durability and resistance to corrosion, making it suitable for BMW vehicles requiring solid rotors with enhanced surface features.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Reduced braking efficiency due to pad glazing or debris accumulation
• Corrosion and rust on rotor surfaces affecting braking performance
• Uneven brake pad wear from inconsistent rotor surface contact
• Vibration or noise caused by rotor surface imperfections

Installation Notes and Tips

• Ensure the rotor thickness is above the discard thickness of 10.400 mm (0.409 inches) before installation
• Clean the rotor surface to remove any protective coatings or contaminants prior to mounting
• Verify the rotor’s mounting bolt hole circle diameter of 120 mm (4.724 inches) matches the vehicle hub
• Use proper torque specifications for the 5 lug bolts to avoid warping
• Check for ABS tone ring compatibility; this rotor does not include an ABS tone ring

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish provides additional protection against corrosion, contributing to long-term durability. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against manufacturing defects. It is recommended to consult the product documentation or manufacturer for exact warranty terms.