Stoptech 127.34018L Disc Brake Rotor - Front Left

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34018L) are engineered for BMW models including the 318i, 318is, 325e, 325es, 325i, 325is, and 325iX. These rotors provide reliable braking performance with a vented design and a coated hat finish to resist corrosion.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Vented rotor design to reduce brake fade under heavy use
• Coated hat finish for enhanced corrosion resistance
• Floating disc mounting for better rotor alignment and reduced stress
• Compatible with BMW 318i, 318is, 325e, 325es, 325i, 325is, and 325iX models
• Part Number: 127.34018L

Detailed Product Specifications

This disc brake rotor features a nominal thickness of 0.862 inches (21.9 mm) and a discard thickness of 0.803 inches (20.4 mm), ensuring a durable lifespan before replacement is necessary. The rotor has an outside diameter of 10.236 inches (260 mm) and an overall height of 1.386 inches (35.2 mm). It includes four stud/lug holes with a diameter of 0.591 inches (15 mm) and a mounting bolt hole circle diameter of 3.937 inches (100 mm). The center hole diameter measures 2.598 inches (66 mm). The rotor weighs approximately 11.27 lbs (5.12 kg) and features a straight vane style for efficient cooling. This rotor does not include ABS tone rings or bearings.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking performance through improved heat management and pad bite. The cross-drilled and slotted surface helps to evacuate gases, dust, and water from the rotor surface, which can improve braking consistency and reduce fade. The vented rotor design further aids in cooling, making this line suitable for both street and light track use. The coated hat finish adds protection against rust and corrosion, extending the rotor’s service life.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or heavy braking
• Improves brake pad cleaning to maintain consistent friction
• Helps dissipate heat to prevent rotor warping
• Resists corrosion for longer rotor life in various weather conditions
• Provides stable braking performance for BMW 318i, 318is, 325e, 325es, 325i, 325is, and 325iX models

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.803 inches) before installation
• Use proper torque specifications for mounting bolts to avoid rotor distortion
• Check compatibility with your vehicle’s ABS system as this rotor does not include an ABS tone ring
• Inspect brake pads and calipers during installation for optimal performance
• Follow manufacturer guidelines for bedding-in new rotors and pads

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The vented and coated design ensures durability and consistent braking performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Refer to StopTech or your parts provider for exact warranty terms.