Stoptech 227.66057L Disc Brake Rotor - Front Left

Overview of StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 227.66057L) are engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed to meet the demands of vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500, these rotors provide consistent stopping power with enhanced heat dissipation.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Vented rotor design to reduce brake fade during heavy use
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with 6-lug wheel configurations and specific bolt patterns
• Precision dimensions including 330 mm outside diameter and 30 mm nominal thickness

Product Line Details

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on delivering enhanced braking performance through advanced rotor surface technology. The combination of cross-drilled holes and slots helps to evacuate gases, dust, and water from the braking surface, which is particularly beneficial for trucks and SUVs like the Cadillac Escalade and Chevrolet Tahoe. This product line balances performance and durability, making it suitable for both daily driving and moderate towing or hauling applications.

Technical Specifications and Features

This disc brake rotor features a vented design with straight vanes to optimize airflow and cooling. The rotor measures 330 mm (12.992 inches) in outside diameter with a nominal thickness of 30 mm (1.181 inches) and a discard thickness of 28 mm (1.102 inches). The overall height is 55 mm (2.165 inches), and it includes a floating disc mounting system to reduce stress and improve rotor lifespan. The rotor is designed for vehicles with a 6-lug wheel pattern, 140.5 mm (5.531 inches) bolt circle diameter, and 16.08 mm (0.633 inches) stud diameter. Note that this rotor does not include an ABS tone ring or bearings.

Compatible Vehicles

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

Common Applications and Problem Solving

• Reduces brake fade during towing or heavy load conditions
• Improves heat dissipation to prevent rotor warping
• Enhances braking response and pad bite with slotted and drilled surface
• Helps maintain consistent braking performance in wet or dusty environments
• Addresses rotor wear and thickness discard limits for safe operation

Installation Notes and Tips

• Ensure compatibility with vehicle make and model before installation
• Check rotor thickness and discard limits to confirm suitability
• Use proper torque specifications for mounting bolts on the 6-lug pattern
• Inspect brake pads and replace if worn to maximize rotor performance
• Floating disc mounting requires correct alignment to avoid noise or vibration

Quality Assurance and Warranty

StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. Each rotor undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty covering defects in materials and workmanship.