Stoptech 126.66044SL Disc Brake Rotor - Rear Left

StopTech Sport Slotted Disc Brake Rotors Overview

The StopTech Sport Slotted Disc Brake Rotor, part number 126.66044SL, is engineered for Chevrolet and GMC heavy-duty trucks and vans. Designed to provide consistent braking performance, this vented, slotted rotor is built to meet the demands of vehicles like the Silverado 2500 HD and Savana 3500.

• Vented disc brake rotor with slotted surface for improved heat dissipation
• Coated hat finish to resist corrosion and extend rotor life
• Nominal thickness of 1.142 inches (29.000 mm) with discard thickness at 1.063 inches (27.000 mm)
• Overall diameter of 12.992 inches (330.000 mm) for optimal fitment
• Designed for 8 lug/stud holes with 6.500 inch (165.100 mm) bolt circle diameter

Detailed Product Specifications

This StopTech rotor features a vented design with straight vanes to enhance airflow and reduce brake fade during heavy use. The slotted surface improves pad bite and helps evacuate gases and debris, maintaining consistent braking performance. The rotor’s coated hat finish provides corrosion resistance, which is essential for vehicles exposed to harsh environments. With an overall height of 3.673 inches (93.300 mm) and a center hole diameter of 4.835 inches (122.800 mm), this rotor is engineered for precise fitment on Chevrolet Avalanche 2500, GMC Sierra 3500, and other compatible models.

StopTech Sport Slotted Disc Brake Rotors Product Line

The StopTech Sport Slotted Disc Brake Rotors line focuses on performance-oriented rotors that balance durability and enhanced braking capabilities. This product line is designed for drivers who require reliable stopping power under demanding conditions, such as towing or heavy hauling, making it suitable for Chevrolet and GMC trucks and vans listed in the fitment.

Applications and Problem Solving

• Replacement for worn or warped rotors on Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD
• Improves braking performance under heavy load or towing conditions
• Reduces brake fade caused by heat buildup during extended braking
• Helps eliminate brake noise and vibration associated with rotor wear
• Prevents corrosion-related rotor damage in harsh weather environments

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 1.063 inches (27.000 mm) before installation. Clean the rotor surface to remove any protective coating or debris prior to mounting. This rotor is designed for vehicles with 8 lug/stud holes and a 6.500 inch (165.100 mm) bolt circle diameter; verify compatibility with your specific Chevrolet or GMC model. Proper torque specifications should be followed when tightening lug nuts to avoid rotor warping.

Quality Assurance and Warranty

StopTech Sport Slotted Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish enhances corrosion resistance, contributing to longer service life. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed quality assurance to ensure reliability and performance.