Stoptech 127.45078L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.45078L) are engineered for Mazda 3 vehicles requiring reliable and consistent braking performance. These vented rotors feature a coated hat finish and a floating disc mounting design to enhance heat dissipation and reduce brake fade under demanding conditions.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design with straight vane style for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting to accommodate thermal expansion
• Compatible with Mazda 3 models requiring 320mm outside diameter rotors
• 5 lug holes with 114.3mm bolt circle diameter and 13.8mm stud diameter
• Nominal thickness of 25.0mm and discard thickness of 23.0mm

Detailed Product Description

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are designed specifically for Mazda 3 vehicles, providing a balance of performance and durability. The rotors measure 320mm in outside diameter with a nominal thickness of 25.0mm and a discard thickness of 23.0mm, ensuring compatibility with factory specifications. Featuring a vented rotor design with straight vanes, these rotors promote effective airflow to reduce heat buildup during braking. The cross-drilled and slotted surface pattern helps to evacuate gases, dust, and water, improving brake pad contact and reducing the risk of brake fade. The coated hat finish protects against rust and corrosion, maintaining rotor integrity over time. Additionally, the floating disc mounting design allows for slight movement between the rotor and hub, accommodating thermal expansion and minimizing stress on the braking system.

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. This product line combines cross-drilled holes and precision slots to improve heat dissipation and maintain consistent braking under aggressive driving conditions. The rotors are vented with straight vanes to optimize cooling, and the coated hat finish adds corrosion resistance. This part number 127.45078L is a representative example designed for Mazda 3 applications, offering a balance of durability and performance for street and light track use.

Common Applications and Problem Solving

• Reduces brake fade caused by excessive heat buildup during spirited driving
• Improves braking performance in wet conditions by channeling water away from the rotor surface
• Minimizes brake dust accumulation for cleaner rotor and pad contact
• Prevents corrosion on the rotor hat area with a protective coating
• Maintains consistent braking feel by accommodating thermal expansion with floating disc mounting

Installation Notes and Tips

• Ensure compatibility with Mazda 3 models requiring 320mm rotors and 5-lug, 114.3mm bolt circle
• Inspect brake pads and calipers for wear or damage before installation
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Perform a proper bed-in procedure after installation to optimize rotor and pad performance
• Check discard thickness regularly to determine rotor replacement intervals

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The rotors undergo rigorous quality control to ensure 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. It is recommended to consult the product documentation or manufacturer for exact warranty terms.