Centric 320.34030H Disc Brake Rotor - Rear

Overview of Centric GCX Elemental Protection Disc Brake Rotor

The Centric GCX Elemental Protection Disc Brake Rotor (part number 320.34030H) is engineered for BMW models including the 318i, 318is, 323i, 323is, 325i, 325is, 328i, and 328is. Designed with a full coating and high carbon content, this rotor offers reliable braking performance and corrosion resistance.

• Full coating on disc and hat for enhanced corrosion protection
• High carbon content for improved heat dissipation and durability
• Solid disc type with smooth surface finish for consistent braking
• Compatible with BMW 318i, 318is, 323i, 323is, 325i, 325is, 328i, and 328is models
• Nominal thickness of 0.394 inches (10.000 mm) with discard thickness at 0.331 inches (8.400 mm)
• Outside diameter of 11.024 inches (280.000 mm) and overall height of 2.366 inches (60.100 mm)
• Five lug holes with 0.591 inch (15.000 mm) diameter and 4.724 inch (120.000 mm) bolt circle diameter

About the Centric GCX Elemental Protection Product Line

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating, High Carbon Content line focuses on providing rotors with a complete protective coating to resist rust and corrosion. The high carbon content enhances rotor strength and heat management, which helps maintain braking performance over time. This product line is designed to meet or exceed OEM specifications, making it suitable for drivers seeking reliable replacement rotors for their BMW vehicles.

Technical Specifications and Features

This rotor is a solid type with a smooth surface finish, ensuring consistent pad contact and braking response. The fully coated disc and coated hat protect against environmental elements, extending rotor life. The nominal thickness is 0.394 inches (10.000 mm), with a discard thickness of 0.331 inches (8.400 mm), indicating when replacement is necessary. The rotor measures 11.024 inches (280.000 mm) in outside diameter and has an overall height of 2.366 inches (60.100 mm). It features five lug holes with a diameter of 0.591 inches (15.000 mm) arranged on a 4.724 inch (120.000 mm) bolt circle diameter. The center hole diameter is 2.953 inches (75.000 mm), and the rotor weighs approximately 10.37 lbs (4.71 kgs).

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 318i, 318is, 323i, 323is, 325i, 325is, 328i, and 328is models
• Addresses rotor corrosion and rust issues with full coating protection
• Improves braking consistency by restoring smooth rotor surface
• Helps reduce brake noise and vibration caused by uneven rotor wear
• Maintains proper rotor thickness to ensure safe braking performance

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness is within nominal specifications and replace if below discard thickness. This rotor does not include bearings or ABS tone rings, so confirm compatibility with your vehicle’s braking system. Use proper torque specifications for lug nuts and mounting bolts to avoid rotor warping. It is recommended to replace brake pads when installing new rotors for optimal performance.

Quality Assurance and Warranty

Centric rotors are manufactured to meet or exceed OEM standards, ensuring reliable fit and function. The full coating provides added corrosion resistance to extend rotor life. While specific warranty details are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.