Stoptech 127.66045L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor (Part Number 127.66045L) 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 with straight vanes to reduce brake fade
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with 6-lug wheel configurations and floating/dih disc mounting
• Precision dimensions: 12.98 inch (329.7 mm) outside diameter, 1.181 inch (30.0 mm) nominal thickness

Detailed Product Features and Specifications

This vented disc brake rotor features a cross-drilled and slotted surface type, which helps to evacuate heat and brake dust more efficiently than standard rotors. The rotor’s nominal thickness is 1.181 inches (30.0 mm), with a discard thickness of 1.122 inches (28.5 mm), ensuring a long service life before replacement is necessary. The overall height measures 3.76 inches (95.5 mm), and the rotor weighs approximately 20.25 lbs (9.2 kg). The hat section is coated to protect against rust and corrosion, maintaining structural integrity over time.

The rotor is designed with a 6-lug hole pattern, 0.65 inch (16.5 mm) diameter stud holes, and a mounting bolt hole circle diameter of 5.5 inches (139.7 mm). It does not include an ABS tone ring or bearings, so these components must be sourced separately if required. The rotor’s floating/dih disc mounting style and straight vane design contribute to effective heat management during braking.

About the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance for trucks and SUVs that require reliable heat dissipation and consistent stopping power. This product line focuses on rotors that feature cross-drilled holes and slots to improve pad bite and reduce brake fade under demanding conditions. The vented rotor design with coated hats helps maintain durability and corrosion resistance, making it suitable for vehicles like the GMC Sierra 1500 and Cadillac Escalade EXT.

Compatible Vehicles and Common Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, Suburban 1500, Tahoe, Express 1500
• GMC Sierra 1500, Yukon, Yukon XL 1500, Savana 1500

This rotor is specifically engineered for these models, ensuring proper fitment and optimal braking performance.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during towing or heavy braking
• Uneven pad wear due to poor heat dissipation
• Corrosion and rust on rotor hats reducing rotor lifespan
• Brake noise and vibration from glazed or warped rotors
• Reduced braking efficiency in wet or dusty conditions

Installation Notes and Tips

• Verify compatibility with your vehicle’s make, model, and year before installation
• Ensure the rotor thickness is above discard thickness before installation
• Use proper torque specifications for mounting bolts to avoid rotor warping
• Inspect brake pads and replace if worn to maximize rotor performance
• Clean rotor surface with brake cleaner before installation to remove any protective coatings

Quality Assurance and Warranty

StopTech 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 a limited warranty against defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.