Dynamic Friction 830-73031L Disc Brake Rotor - Front Left

Overview

The Dynamic Friction 830-73031L is a vented disc brake rotor built for direct fitment on select Audi performance applications. It combines a slotted and drilled surface with a rust-resistant coating and a Geospec silver gray hat finish for a clean, service-ready appearance.

Fits 2004-2009 Audi S4, front left. This rotor is identified by part number 830-73031L and is engineered with a directional braking surface for the specified application.

Key Features

• Slotted and drilled rotor surface for consistent pad contact and heat management.
• Vented construction for improved airflow through the rotor body.
• Rust-resistant coating helps protect exposed surfaces.
• Geospec silver gray hat finish for a refined installed appearance.
• 5-lug, 112 mm bolt pattern with 345 mm outside diameter.

Detailed Description

The Dynamic Friction 830-73031L Geoperformance Rotor is designed for the front left position on compatible Audi S4 models from 2004 through 2009. Its directional, slotted X drilled braking surface supports stable pad bite and helps manage surface gases and debris under repeated braking. The vented rotor design, 28 mm discard thickness, and 30 mm nominal thickness provide the dimensions needed for the listed application.

For buyers searching for an Audi S4 front left brake rotor, this part number 830-73031L offers the specified bolt circle, center hole diameter, and lug-hole layout required for proper fitment. The plain disc finish, rust-resistant coating, and Geospec silver gray hat finish add corrosion protection and a cleaner appearance in the wheel well.

Dynamic Friction’s DFC Geoperformance Rotor line focuses on drilled and slotted brake rotor construction for drivers who want a performance-oriented replacement rotor with application-specific fitment. This rotor is a direct match for the listed Audi S4 fitment and should be selected by position and part number to ensure correct installation.

Common Uses

• Replacing a worn or heat-cycled front left brake rotor.
• Addressing rotor scoring, grooves, or uneven braking feel.
• Restoring proper braking surface thickness on the listed Audi S4 application.
• Updating a damaged rotor with the correct directional drilled and slotted design.

Installation Notes

Verify the front left position, 5-lug pattern, 112 mm bolt circle, and 345 mm outside diameter before installation. Confirm rotor thickness and center hole dimensions against the vehicle’s brake specifications. Because this rotor uses a directional braking surface, install it in the correct orientation for the application.

Quality Assurance

Dynamic Friction supplies application-specific brake components with corrosion-resistant finishes and performance-oriented rotor designs. Part number 830-73031L is built to the listed dimensions and fitment for the specified Audi S4 application.