Stoptech 227.66040L Disc Brake Rotor - Front Left

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

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotor 227.66040L is engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC vehicles. Designed to meet the demands of trucks and SUVs 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 dissipation and brake pad cleaning
• Vented rotor design to reduce brake fade under heavy use
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with 6-lug wheel configurations and 305 mm outside diameter
• Nominal thickness of 29.1 mm with discard thickness at 27.2 mm for durability monitoring

Detailed Product Features and Specifications

This StopTech rotor features a vented design with straight vanes to optimize airflow and cooling during braking. The cross-drilled and slotted surface helps evacuate gases, dust, and water, maintaining consistent brake pad contact and reducing the risk of brake fade. With an overall height of 58.2 mm and a center hole diameter of 78.7 mm, it fits securely on compatible vehicles. The rotor weighs approximately 19.75 lbs (8.98 kgs), balancing strength and weight for effective braking performance. The floating disc mounting system allows slight movement between the rotor and hub, which helps prevent warping and extends rotor life.

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

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance for trucks and SUVs that require reliable heat management and consistent stopping power. This product line focuses on combining cross-drilled holes and slots with vented rotor construction to improve cooling and pad bite, making it suitable for vehicles like the GMC Sierra 1500 and Chevrolet Tahoe. The 227.66040L rotor is a part of this line, offering a balance of durability and performance for daily driving and moderate towing or hauling conditions.

Compatible Vehicles and Common Applications

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

Installation Notes and Tips

Ensure the rotor is installed on vehicles with a 6-lug wheel pattern and verify the mounting bolt hole circle diameter of 139.7 mm (5.5 inches). The rotor does not include bearings or an ABS tone ring, so these components must be reused or replaced separately if needed. Proper cleaning of the rotor surface before installation is recommended to remove any protective coatings. Use a torque wrench to tighten lug nuts to manufacturer specifications to avoid rotor warping.

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The 227.66040L rotor undergoes rigorous quality control to ensure consistent thickness and balance. 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.