DuraGo BR900804 Disc Brake Rotor - Rear

Durable Cast Iron Disc Brake Rotor for Audi S4 and S5

The DuraGo BR900804 disc brake rotor is engineered to provide reliable braking performance for Audi S4 and S5 models. Constructed from full cast iron, this vented rotor offers consistent heat dissipation and durability under demanding driving conditions.

• Material: Full cast iron construction for strength and heat resistance
• Vented design to improve cooling and reduce brake fade
• Nominal thickness of 0.87 inches (22 mm) with discard thickness at 0.79 inches (20 mm)
• Outside diameter of 12.99 inches (330 mm) suitable for specified Audi models
• Five mounting bolt holes with a 4.41 inch (112 mm) bolt circle diameter
• Non-directional brake surface for flexible installation
• Conventional rotor type without ABS tone ring

Technical Details and Specifications

The DuraGo BR900804 rotor features a solid, full cast iron construction designed to withstand the thermal stresses of braking. Its vented design allows air to flow between the rotor surfaces, enhancing heat dissipation and reducing the risk of warping during heavy braking. The rotor measures 12.99 inches (330 mm) in outside diameter and has an overall height of 1.43 inches (36.2 mm). The nominal thickness is 0.87 inches (22 mm), with a discard thickness of 0.79 inches (20 mm), ensuring clear service limits for maintenance. This rotor includes five mounting bolt holes with a 0.6 inch (15.2 mm) diameter and a bolt circle diameter of 4.41 inches (112 mm), matching the factory specifications for Audi S4 and S5 vehicles. The non-directional brake surface allows for installation on either side without performance loss.

Compatible Vehicles and Applications

This disc brake rotor is compatible with the following Audi models:

• Audi S4
• Audi S5

It is designed to replace worn or damaged rotors and restore proper braking function. Common issues addressed by this rotor include:

• Brake rotor warping or uneven wear
• Reduced braking efficiency due to thin or damaged rotors
• Excessive brake noise or vibration
• Overheating and brake fade during heavy use
• Corrosion-related rotor surface degradation (note: this rotor does not have a rust-resistant coating)

Installation Notes and Tips

When installing the DuraGo BR900804 rotor, ensure the following:

• Verify rotor thickness is above discard limits before installation
• Clean the rotor surface to remove any protective coatings or contaminants
• Check compatibility with existing brake pads and hardware
• Torque mounting bolts to manufacturer specifications
• Perform a proper bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

DuraGo manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. While this rotor does not include a rust-resistant coating, its full cast iron construction provides reliable durability. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.