Centric 320.34057F 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 320i, 330Ci, 330i, and 330xi models. Designed with a fully coated disc and hat finish, these rotors offer enhanced corrosion resistance and durability.

• Part Number: 320.34057F
• Compatible with BMW 320i, 330Ci, 330i, and 330xi
• Fully coated disc and hat for corrosion protection
• Vented rotor design for improved heat dissipation
• Outside diameter: 320 mm (12.598 inches)
• Nominal thickness: 21.8 mm (0.858 inches)
• Discard thickness: 20.4 mm (0.803 inches)
• Overall height: 60.5 mm (2.382 inches)
• 5 lug holes with 14.6 mm diameter
• Smooth surface finish for consistent braking

Product Line Details

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating line focuses on providing rotors with a full protective coating to resist rust and corrosion. This coating extends the rotor's service life and maintains a clean appearance, which is especially beneficial for vehicles like the BMW 320i and 330 series that are exposed to varying weather conditions.

Technical Specifications and Features

This disc brake rotor features a vented design with straight vanes to optimize airflow and heat dissipation during braking. The rotor's nominal thickness is 21.8 mm, with a discard thickness of 20.4 mm, ensuring safe replacement intervals. The fully coated disc and hat finishes protect against corrosion, while the smooth surface type supports consistent pad contact and braking performance. The rotor has a center hole diameter of 75 mm and a mounting bolt hole circle diameter of 120 mm, accommodating 5 lug holes sized at 14.6 mm diameter.

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 320i, 330Ci, 330i, and 330xi
• Addresses rotor corrosion and rust buildup
• Improves heat dissipation to reduce brake fade
• Restores smooth braking surface for consistent stopping power
• Prevents premature rotor wear due to environmental exposure

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 20.4 mm before installation. The rotor is designed for floating/dih disc mounting and requires a 5-lug wheel hub with a 120 mm bolt circle diameter. No ABS tone ring or bearings are included, so verify compatibility with your vehicle's existing components. Proper cleaning of the rotor surface before installation is recommended to remove any protective coating residue.

Quality Assurance and Warranty

Centric rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The full coating process enhances corrosion resistance, contributing to longer rotor life. While specific warranty details are not provided, Centric products typically come with a limited warranty against defects in materials and workmanship.