Stoptech 127.66040L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.66040L) is engineered for reliable braking performance on select GM trucks and SUVs. Designed to meet the demands of vehicles like the Chevrolet Silverado 1500 and Cadillac Escalade, this rotor offers enhanced heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for improved 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 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 enhances braking efficiency by allowing gases and debris to escape while improving rotor cooling. The vented construction further aids in heat management, making these rotors suitable for trucks and SUVs that require dependable braking under load or towing conditions.

Technical Specifications and Features

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 solid lifespan before replacement is necessary. The rotor measures 12.008 inches (305 mm) in outside diameter with an overall height of 2.291 inches (58.2 mm). It includes a floating disc mounting system and straight vane style for efficient airflow and heat dissipation. The rotor is designed for vehicles with a 6-lug, 5.5-inch bolt circle diameter, and a center hole diameter of 3.098 inches (78.7 mm). The hat is coated to resist corrosion, and the rotor weighs approximately 19.75 lbs (8.98 kg).

Compatible Vehicles and Applications

This StopTech rotor is compatible with a range of GM trucks and SUVs, including:

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

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat during towing or heavy braking
• Uneven rotor wear and reduced braking efficiency
• Corrosion and rust buildup on rotor surfaces
• Brake noise and vibration due to glazing or rotor warping
• Insufficient cooling leading to premature brake component wear

Installation Notes and Tips

• Ensure compatibility with your vehicle’s make, model, and year before installation
• Inspect brake pads and replace if worn to maintain optimal braking performance
• Clean mounting surfaces and hub to prevent rotor runout
• Torque lug nuts to manufacturer specifications to avoid rotor distortion
• Perform a proper bed-in procedure after installation for consistent braking

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM standards for durability and performance. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details may vary, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always refer to the product documentation or manufacturer for exact warranty terms.