Stoptech 126.66074SR Disc Brake Rotor - Front Right

StopTech Sport Slotted Disc Brake Rotors Overview

The StopTech Sport Slotted Disc Brake Rotors (Part Number 126.66074SR) are engineered for heavy-duty Chevrolet and GMC trucks, including the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, and Suburban 3500 HD. Designed to provide consistent braking performance under demanding conditions, these rotors feature a vented, slotted surface for improved heat dissipation and brake pad bite.

• Vented disc brake rotor with slotted surface for enhanced cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Compatible with 8-lug wheel configurations on Chevrolet and GMC heavy-duty trucks
• Nominal thickness of 1.575 inches (40.000 mm) with discard thickness at 1.516 inches (38.500 mm)
• Outside diameter of 13.976 inches (355.000 mm) for precise fitment
• Overall height of 4.016 inches (102.000 mm) ensuring proper caliper clearance

Detailed Product Description

The StopTech Sport Slotted Disc Brake Rotors (126.66074SR) are designed specifically for heavy-duty Chevrolet and GMC trucks such as the Silverado 2500 HD and Sierra 3500 HD. These rotors feature a vented design with straight vanes that promote efficient heat dissipation during braking, reducing the risk of brake fade. The slotted surface improves pad bite and helps evacuate gases and debris from the rotor surface, maintaining consistent braking performance. The coated hat finish protects against rust and corrosion, which is critical for vehicles exposed to harsh environments.

With a floating disc mounting system, these rotors accommodate thermal expansion and contraction, reducing the risk of warping under heavy use. The rotor’s dimensions, including an outside diameter of 355 mm and a nominal thickness of 40 mm, ensure compatibility with the specified Chevrolet and GMC models. The 8-lug hole pattern and mounting bolt circle diameter of 180 mm provide a secure fit for the heavy-duty applications these trucks demand.

StopTech Sport Slotted Disc Brake Rotors Product Line

The StopTech Sport Slotted Disc Brake Rotors line is designed to meet the needs of performance and heavy-duty vehicles requiring enhanced braking capabilities. This product line focuses on rotors that offer improved heat management and consistent braking through features like slotted surfaces and vented designs. The 126.66074SR rotor exemplifies this approach by combining durability with performance-oriented features suitable for Chevrolet and GMC heavy-duty trucks.

Common Applications and Problem Solving

• Reduces brake fade during heavy towing or hauling
• Improves braking response in off-road or rugged conditions
• Minimizes rotor warping caused by high heat buildup
• Prevents corrosion-related rotor degradation
• Enhances pad bite and braking consistency under load

Installation Notes and Tips

• Ensure compatibility with Chevrolet and GMC models listed: Sierra 2500 HD, Sierra 3500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, and Suburban 3500 HD
• Verify 8-lug wheel configuration and mounting bolt circle diameter of 180 mm before installation
• Inspect brake pads and calipers for wear and replace if necessary to maintain optimal braking performance
• Follow manufacturer torque specifications for mounting bolts to ensure secure installation
• Check rotor thickness and discard limits during installation to confirm rotor usability

Quality Assurance and Warranty

StopTech Sport Slotted Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The coated hat finish provides corrosion resistance, extending the rotor’s service life. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed warranties covering defects in materials and workmanship. It is recommended to consult the product documentation or StopTech directly for precise warranty information.