Stoptech 227.66045L Disc Brake Rotor - Rear Left

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

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotor 227.66045L is engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed to meet OEM specifications, this vented rotor features a slotted and drilled surface to enhance heat dissipation and maintain consistent stopping power.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design to reduce brake fade under heavy use
• Nominal thickness of 1.181 inches (30.000 mm) with discard thickness at 1.122 inches (28.500 mm)
• Overall height of 3.760 inches (95.500 mm) and outside diameter of 12.980 inches (329.700 mm)
• 6 lug holes with a 5.500 inch (139.700 mm) bolt circle diameter
• Compatible with ABS systems (ABS tone ring not included)
• Weight approximately 20.25 lbs (9.2 kg) for balanced performance

Detailed Product Description

This StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotor (part number 227.66045L) is designed specifically for heavy-duty applications on vehicles such as the Cadillac Escalade, Chevrolet Silverado 1500, and GMC Sierra 1500. The rotor’s vented construction with straight vanes promotes efficient airflow to reduce heat buildup during braking. The cross-drilled holes and precision-machined slots help evacuate gases and debris from the brake pad surface, improving pad bite and reducing the risk of brake fade.

The rotor measures 12.980 inches in outside diameter and has a nominal thickness of 1.181 inches, ensuring compatibility with factory calipers and brake pads. It features a 6-lug bolt pattern with a 5.500 inch bolt circle diameter, matching the wheel hub specifications of the listed vehicles. The center hole diameter is 3.094 inches, allowing for proper hub fitment. This rotor does not include bearings or an ABS tone ring, so those components must be sourced separately if required.

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 demand reliable stopping power under varied driving conditions. This product line combines cross-drilled holes and slots with vented rotor technology to improve heat dissipation and maintain consistent brake pad contact. The 227.66045L rotor is a part of this line, offering a balance of durability and performance for vehicles like the Cadillac Escalade and Chevrolet Silverado 1500.

Common Applications and Problem Solving

• Reduces brake fade during towing or heavy load conditions
• Improves braking response on large SUVs and trucks
• Minimizes heat buildup for longer rotor and pad life
• Helps prevent brake pad glazing and uneven wear
• Maintains consistent stopping power in wet or dusty environments

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (1.122 inches) before installation
• Verify compatibility with vehicle ABS system; ABS tone ring not included
• Clean rotor surface with brake cleaner before installation to remove any protective coating
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Inspect brake pads and calipers for wear or damage during rotor replacement

Quality Assurance and Warranty

StopTech Select Sport rotors are manufactured to meet or exceed OEM standards for fit, form, and function. Each rotor undergoes strict quality control to ensure dimensional accuracy and material integrity. 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 StopTech directly for warranty terms related to part number 227.66045L.