Centric 320.66074F Disc Brake Rotor - Front

Overview of Centric GCX Elemental Protection Disc Brake Rotors

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating provide reliable braking performance for heavy-duty Chevrolet and GMC trucks. Designed specifically for models like the Silverado 2500 HD and Sierra 3500 HD, these rotors offer durability and corrosion resistance through a full coating finish.

• Part Number: 320.66074F
• Fully coated disc and hat finish for enhanced corrosion protection
• Vented rotor design with straight vane style for improved heat dissipation
• 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)
• Floating disc mounting and smooth surface type
• Compatible with Chevrolet and GMC heavy-duty trucks including Silverado 2500, 2500 HD, 3500, 3500 HD, Sierra 2500 HD, Sierra 3500 HD, and Suburban 3500 HD
• Eight stud/lug holes with a diameter of 0.646 inches (16.400 mm)

Product Line Details: Centric GCX Elemental Protection Disc Brake Rotors - Full Coating

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating line focuses on providing rotors with a comprehensive protective coating that guards against rust and corrosion. This full coating extends the rotor’s service life, especially in harsh environments where road salt and moisture are common. The coated hat and disc surfaces maintain structural integrity and appearance over time, making them suitable for heavy-duty applications on Chevrolet and GMC trucks.

Technical Specifications and Features

This disc brake rotor features a vented design with straight vanes to facilitate efficient heat dissipation during braking, reducing the risk of brake fade. The rotor’s nominal thickness is 1.575 inches (40.000 mm), with a discard thickness of 1.516 inches (38.500 mm), ensuring safe replacement intervals. The rotor measures 13.976 inches (355.000 mm) in outside diameter and has an overall height of 4.016 inches (102.000 mm). The floating disc mounting system allows for slight movement to reduce stress and improve braking consistency. The smooth surface finish supports even pad wear and quiet operation.

Compatible Vehicles and Applications

• Chevrolet Silverado 2500 and 2500 HD
• Chevrolet Silverado 3500 and 3500 HD
• Chevrolet Suburban 3500 HD
• GMC Sierra 2500 HD and 3500 HD

This rotor is designed for heavy-duty trucks requiring reliable braking under demanding conditions, including towing and hauling.

Common Issues Addressed by This Rotor

• Corrosion and rust buildup on brake rotors
• Brake fade due to overheating during heavy use
• Uneven brake pad wear caused by rotor surface irregularities
• Premature rotor failure from environmental exposure
• Noise and vibration from worn or damaged rotors

Installation Notes and Tips

Ensure the rotor is installed on compatible Chevrolet or GMC heavy-duty trucks as specified. Clean the hub surface before installation to prevent runout. Use proper torque specifications on the eight lug studs (0.646 inch diameter) to secure the rotor. Since this rotor does not include bearings or an ABS tone ring, verify compatibility with your vehicle’s braking system. Check rotor thickness before installation to confirm it meets minimum specifications.

Quality Assurance and Warranty

Centric rotors undergo rigorous quality control to meet OEM standards for fit, form, and function. The full coating process enhances corrosion resistance, contributing to longer service life. While specific warranty details are not provided here, Centric typically offers coverage against defects in materials and workmanship. Refer to manufacturer documentation for exact warranty terms.