Stoptech 126.66040SL Disc Brake Rotor - Front Left

StopTech Sport Slotted Disc Brake Rotors Overview

The StopTech Sport Slotted Disc Brake Rotor 126.66040SL is engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed with vented construction and a slotted surface, this rotor enhances heat dissipation and brake pad bite for consistent stopping power.

• Vented disc brake rotor with slotted surface for improved cooling and debris removal
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting design with straight vane style for efficient airflow
• Compatible with 6-lug wheel hubs featuring a 5.5-inch bolt circle diameter
• Outside diameter of 305 mm (12.008 inches) and nominal thickness of 29.1 mm (1.146 inches)

Detailed Product Features and Specifications

This StopTech rotor features a vented design with straight vanes that promote effective heat dissipation during heavy braking, reducing the risk of brake fade. The slotted surface improves pad bite and helps channel away dust, gas, and water for consistent braking performance. The rotor’s coated hat finish provides corrosion resistance, maintaining structural integrity over time. With an overall height of 58.2 mm (2.291 inches) and a center hole diameter of 78.7 mm (3.098 inches), it fits securely on compatible wheel hubs. The floating disc mounting system allows for slight rotor movement, which can help reduce stress and improve brake feel. Weighing approximately 8.98 kg (19.75 lbs), this rotor balances durability and weight for optimal performance.

StopTech Sport Slotted Disc Brake Rotors Product Line

The StopTech Sport Slotted Disc Brake Rotors line is designed to provide enhanced braking performance for trucks and SUVs that require reliable heat management and consistent pad contact. This product line focuses on slotted rotors with vented construction, offering improved cooling and debris evacuation compared to standard rotors. The 126.66040SL part number is a representative model within this line, engineered to meet the demands of vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, Silverado 1500 Classic, Silverado 1500 HD, 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 caused by excessive heat during towing or heavy loads
• Uneven brake pad wear due to poor rotor surface design
• Corrosion and rust buildup on rotor hats reducing lifespan
• Reduced braking performance in wet or debris-filled conditions
• Vibration or noise from warped or damaged rotors

Installation Notes and Tips

• Ensure compatibility with vehicle make and model before installation
• Inspect wheel hub and bearings for wear prior to rotor installation
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Replace brake pads when installing new rotors for optimal performance
• Check for ABS tone ring compatibility; this rotor does not include an ABS tone ring

Quality Assurance and Warranty

StopTech Sport Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated finish and vented design contribute to long-term durability and consistent braking performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.