Dynamite Friction 631-73045L Disc Brake Rotor - Rear Left

Overview of the DFC Brake Rotor - Drilled and Slotted - Silver

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-73045L) is engineered for Audi A4 and A4 Quattro models. This solid disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with Audi A4 and A4 Quattro
• Part number: 631-73045L
• Solid disc rotor with drilled and slotted surface
• Nominal thickness: 12 mm; discard thickness: 10 mm
• Outside diameter: 255 mm; overall height: 39.8 mm
• Rust resistant zinc silver hat finish
• 5 bolt holes with 112 mm bolt circle diameter
• Directional brake surface for optimized performance

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Silver is a solid rotor with a nominal thickness of 12 mm and a discard thickness of 10 mm, ensuring reliable service life and safety margins. The rotor’s outside diameter measures 255 mm with an overall height of 39.8 mm, matching the precise fitment requirements for Audi A4 and A4 Quattro vehicles. The rotor surface is both drilled and slotted, which helps to reduce brake fade by improving heat dissipation and allowing gases and debris to escape during braking.

The rotor hat is finished with a zinc silver coating that provides rust resistance, extending the rotor’s durability in various driving conditions. It features a 5-bolt hole pattern with a 112 mm bolt circle diameter and a center hole diameter of 68 mm, ensuring proper alignment and fitment. The directional brake surface is designed to optimize braking efficiency and maintain consistent performance under demanding conditions.

About the DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve braking response and heat management. This product line is tailored for drivers who require rotors that maintain performance under stress while resisting corrosion through protective coatings. The silver zinc finish on the rotor hat enhances longevity, making it suitable for regular use on compatible Audi models.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Audi A4 and A4 Quattro
• Improves heat dissipation to reduce brake fade during heavy braking
• Helps prevent brake pad glazing by channeling away dust and gases
• Addresses rotor corrosion issues with rust resistant coating
• Restores braking performance and pedal feel for safer driving

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (10 mm) before installation
• Verify bolt hole pattern and center hole diameter for proper fitment
• Clean rotor surface and hub mounting area to prevent uneven wear
• Use proper torque specifications on lug nuts to avoid rotor warping
• Check brake pads for wear and replace if necessary during rotor installation

Quality Assurance and Warranty

Dynamite Friction manufactures the 631-73045L rotor to meet OEM specifications for Audi A4 and A4 Quattro models. The rust resistant zinc silver finish and precise machining ensure consistent performance and durability. Warranty details are provided by the manufacturer and should be confirmed at the time of purchase.