Stoptech 127.66057L 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 127.66057L) are engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed to enhance heat dissipation and maintain consistent stopping power, these rotors are a solid upgrade for vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design to reduce brake fade under heavy use
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Compatible with 6-lug wheel configurations and specific bolt patterns

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on performance-oriented rotors that combine cross-drilled holes and precision slots. This design improves brake pad bite and helps evacuate gases, dust, and water from the rotor surface. The vented construction further aids in cooling, making these rotors suitable for trucks and SUVs that require consistent braking under demanding conditions. The 127.66057L rotor features a coated hat finish to protect against rust, ensuring durability over time.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.181 inches (30.000 mm) and a discard thickness of 1.102 inches (28.000 mm), indicating when replacement is necessary. The overall height measures 2.165 inches (55.000 mm), with an outside diameter of 12.992 inches (330.000 mm). It includes a floating disc mounting system and a straight vane style for efficient airflow. The rotor is designed for vehicles with a 6-lug wheel pattern, 5.531 inch (140.500 mm) bolt circle diameter, and 0.633 inch (16.080 mm) stud hole diameter. Note that this rotor does not include ABS tone rings or bearings.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT, and XTS
• Chevrolet Avalanche, Silverado 1500 (including Classic and LD), Suburban 1500, Tahoe, and Express 1500
• GMC Sierra 1500 (including Classic, Limited), Yukon, Yukon XL, Yukon XL 1500, and Savana 1500

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat during towing or heavy braking
• Uneven brake pad wear due to poor heat dissipation
• Corrosion and rust buildup on rotor hats and surfaces
• Reduced braking performance in wet or dusty conditions
• Vibration or noise from warped or damaged rotors

Installation Notes and Tips

• Ensure rotor discard thickness is checked before installation to confirm suitability
• Use proper torque specifications for lug nuts to avoid rotor warping
• Clean rotor surface and hub mounting area to prevent uneven contact
• Verify compatibility with vehicle ABS system as this rotor does not include an ABS tone ring
• Inspect brake pads and calipers during installation for optimal performance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted 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. Always consult the product documentation or manufacturer for exact warranty terms.