Centric 320.34078F Disc Brake Rotor - Rear

Overview of Centric GCX Elemental Protection Disc Brake Rotors

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating provide reliable braking performance for BMW 323i, 325i, and 328i models. Designed with a fully coated disc and hat finish, these rotors offer enhanced corrosion resistance and durability for long-term use.

• Compatible with BMW 323i, 325i, and 328i
• Part Number: 320.34078F
• Fully coated disc and hat finish for corrosion protection
• Vented rotor design for improved heat dissipation
• Nominal thickness: 0.787 inches (20.000 mm)
• Discard thickness: 0.724 inches (18.400 mm)
• Outside diameter: 11.803 inches (299.800 mm)
• Overall height: 2.606 inches (66.200 mm)
• 5 stud/lug holes with 0.579 inch (14.700 mm) diameter
• Smooth surface type for consistent braking

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 and maintains braking efficiency, especially in environments prone to moisture and road salt exposure. This product line is engineered to meet or exceed OEM specifications, making it suitable for BMW 3 Series models such as the 323i, 325i, and 328i.

Technical Specifications and Features

This disc brake rotor features a vented design with straight vanes to optimize airflow and heat dissipation during braking. The nominal thickness of 0.787 inches (20.000 mm) ensures structural integrity, while the discard thickness of 0.724 inches (18.400 mm) indicates the minimum safe thickness before replacement is necessary. The rotor’s outside diameter measures 11.803 inches (299.800 mm), and the overall height is 2.606 inches (66.200 mm). The hat and disc are fully coated to resist corrosion, and the smooth surface finish supports consistent pad contact and braking performance. The rotor includes five stud/lug holes with a diameter of 0.579 inches (14.700 mm) and a mounting bolt hole circle diameter of 4.724 inches (120.000 mm). The center hole diameter is 2.953 inches (75.000 mm), and the rotor weighs approximately 13.75 lbs (6.25 kgs).

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 323i, 325i, and 328i
• Addresses rotor corrosion and rust issues due to environmental exposure
• Improves braking consistency by restoring smooth rotor surface
• Helps reduce brake noise and vibration caused by uneven rotor wear
• Supports safe braking performance by maintaining proper rotor thickness

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 0.724 inches (18.400 mm) before installation. Clean the hub surface to remove rust or debris for proper rotor seating. Use appropriate torque specifications for the 5 lug nuts to avoid rotor warping. Since this rotor does not include an ABS tone ring or bearings, verify compatibility with your vehicle’s existing components. It is recommended to replace brake pads when installing new rotors to ensure optimal braking performance.

Quality Assurance and Warranty

Centric rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The full coating on the disc and hat provides enhanced 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. Always consult product documentation or the manufacturer for exact warranty terms.