Stoptech 127.66042R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.66042R) is engineered for reliable braking performance on heavy-duty vehicles. Designed specifically for select Cadillac, Chevrolet, GMC, and Hummer models, this rotor offers enhanced heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design with straight vane style for optimal cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced stress
• Compatible with 8-lug wheel configurations and includes two miscellaneous holes for mounting

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 heat and debris during braking. The vented rotor construction with straight vanes enhances airflow, reducing the risk of brake fade under demanding conditions. The coated hat finish provides corrosion resistance, making these rotors suitable for vehicles exposed to harsh environments.

Technical Specifications and Compatibility

This disc brake rotor features a nominal thickness of 1.496 inches (38.000 mm) and a discard thickness of 1.437 inches (36.500 mm), ensuring a durable braking surface throughout its service life. The rotor’s outside diameter measures 12.787 inches (324.800 mm), with an overall height of 3.512 inches (89.200 mm). It is designed with a center hole diameter of 4.650 inches (118.100 mm) and a mounting bolt hole circle diameter of 6.500 inches (165.100 mm), accommodating 8 lug holes each 0.650 inches (16.500 mm) in diameter. Weighing approximately 25.72 lbs (11.69 kgs), this vented rotor uses a floating disc mounting system and includes two miscellaneous holes for additional mounting options.

Compatible Vehicles

This rotor is compatible with a range of heavy-duty vehicles, including:

• Cadillac DeVille
• Chevrolet Avalanche 2500, Silverado 1500, Silverado 1500 HD, Silverado 2500, Suburban 2500
• GMC Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Yukon XL 2500
• Hummer H2
• Chevrolet Express 2500, Express 3500
• GMC Savana 2500, Savana 3500

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during heavy braking
• Uneven rotor wear and reduced braking efficiency
• Corrosion and rust on rotor surfaces affecting performance
• Brake pad glazing due to poor heat dissipation
• Vibration or noise from warped or damaged rotors

Installation Notes and Tips

• Ensure the rotor thickness is above the discard thickness of 1.437 inches before installation
• Verify compatibility with vehicle lug pattern and bolt circle diameter
• Clean rotor surface before installation to remove any protective coatings or debris
• Use proper torque specifications on lug nuts to avoid rotor warping
• Inspect brake pads and calipers during rotor replacement for optimal performance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications for durability and performance. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed quality assurance to ensure reliability and safety.