Stoptech 127.66040R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.66040R) are engineered for enhanced braking performance and durability. Designed specifically for select Cadillac, Chevrolet, and GMC models, these rotors provide reliable stopping power with improved heat dissipation.

• Cross-drilled and slotted surface for efficient heat and gas dissipation
• 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 rotor alignment and performance
• Compatible with 6-lug wheel configurations on select GM trucks and SUVs

Detailed Product Features and Specifications

This disc brake rotor features a nominal thickness of 1.146 inches (29.1 mm) and a discard thickness of 1.071 inches (27.2 mm), ensuring a long service life before replacement is necessary. The rotor has an outside diameter of 12.008 inches (305 mm) and an overall height of 2.291 inches (58.2 mm). Its vented design with straight vanes improves airflow to maintain optimal operating temperatures during braking. The rotor’s hat is coated to protect against rust and corrosion, which is especially beneficial for vehicles exposed to harsh weather conditions.

The rotor includes six stud/lug holes with a diameter of 0.646 inches (16.4 mm) and a mounting bolt hole circle diameter of 5.5 inches (139.7 mm). The center hole diameter measures 3.098 inches (78.7 mm). This part does not include ABS tone rings or bearings, so it is intended for use with compatible factory components.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat dissipation and reduced brake fade. The cross-drilled and slotted surface pattern helps evacuate gases and debris from the rotor surface, maintaining consistent pad contact. This product line is well-suited for drivers who require reliable braking performance on trucks and SUVs such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, Suburban 1500, Tahoe
• GMC Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD, Yukon, Yukon XL 1500
• Chevrolet Astro, Express 1500, Express 2500, Safari, Savana 1500, Savana 2500

Common Issues Addressed by This Rotor

• Brake fade during heavy or prolonged braking
• Overheating of brake components leading to reduced performance
• Corrosion and rust buildup on rotor surfaces
• Uneven brake pad wear due to poor heat dissipation
• Vibration or noise caused by warped or damaged rotors

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 1.071 inches before installation. Clean the rotor surface to remove any protective coatings or debris. Use proper torque specifications for the 6-lug wheel studs and verify compatibility with existing brake pads and calipers. Since this rotor does not include bearings or ABS tone rings, confirm these components are in good condition or replaced as needed. Proper bedding-in of new rotors and pads is recommended to optimize braking performance.

Quality Assurance and Warranty

StopTech 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.