The Precision Upgrade: An Audi RS4 (B9) STOPFLEX Carbon-Ceramic System
The Audi RS4 Avant is the definitive high-performance sport wagon, a master of winding roads thanks to its potent twin-turbo V6 and legendary Quattro grip. This case study details the installation of a **STOPFLEX Front-Axle Carbon-Ceramic Rotor Kit**—an engineered solution designed to amplify the RS4's corner-carving prowess.
The Focused Front-Axle System
This is a direct-fit rotor and pad upgrade designed for the factory multi-piston calipers. By strategically enhancing the front axle, it provides a transformative improvement to the RS4's braking endurance and handling response.
- Vehicle: Audi RS4 Avant (B9)
- Front Rotors: STOPFLEX 400mm Carbon-Ceramic Discs with custom-fit billet aluminum hats
- Brake Pads: STOPFLEX Performance Pads formulated for Carbon-Ceramic
- Brake Lines: STOPFLEX Stainless Steel Braided Lines
Fitment Requirements for STOPFLEX Rotors
This direct-fit upgrade is possible because the Audi RS4 is factory-equipped with performance hardware that meets our two critical conditions:
- Caliper Type: The factory front calipers are the required opposed multi-piston (fixed) design.
- Minimum Size: The factory brakes are well above our 355mm minimum size requirement.
Key Advantages for the RS4's Dynamics
This system is engineered to work in synergy with the RS4's specific layout, sharpening its strengths and solving common pain points.
- Engineered for the RS4's Aggressive Dynamics: With nearly 60% of its weight over the front wheels, the RS4's agility is dictated by its front-end grip. Our 400mm front-axle system provides fade-proof stopping power and a firm, confidence-inspiring pedal, allowing the driver to attack corners with absolute precision.
- Unlocking a Sharper, More Responsive Chassis: Our carbon-ceramic discs are **up to 50% lighter than the factory iron rotors.** This substantial reduction in unsprung mass is transformative for the RS4, making the steering more communicative and the front suspension faster to react. The car feels significantly more eager to change direction—a critical advantage on the tight mountain roads of Taiwan.
- Consistent Performance for the Twin-Turbo V6: The RS4's potent engine can easily overwhelm the stock iron rotors during spirited drives. Our carbon-ceramic system provides the necessary thermal headroom to use that power with complete confidence, ensuring your brakes are always ready, no matter how hard you push.
- The Definitive Solution for Audi Brake Dust: Our system virtually eliminates the heavy, corrosive dust from factory pads, a notorious issue for Audi owners. This keeps the aggressive 20-inch wheels pristine, preserving the RS4's clean, performance-focused aesthetic with minimal maintenance.
Installation Gallery
Frequently Asked Questions for RS4 Owners
Q: Why is a front-axle-only upgrade so effective for the RS4?
A: Due to the RS4's front-biased weight distribution (~60/40), the front brakes handle the vast majority of the braking and thermal load. By upgrading the front axle with a lightweight, high-heat-capacity carbon-ceramic system, you make the most significant possible improvement to the car's overall handling dynamics and braking endurance.
Q: How does this compare to the factory Audi Sport carbon ceramic brake option?
A: Our system is engineered to provide the same elite-level benefits—fade-proof performance, dramatic weight savings, and dust-free operation—as the very expensive factory ceramic option. By utilizing your car's excellent factory calipers, we offer this performance as a direct rotor upgrade, providing an exceptional value proposition.
Q: Are these brakes suitable for a daily-driven RS4 in Taiwan?
A: Perfectly. Despite their immense performance capabilities, our pads are formulated for excellent response from a cold start. The silent operation and the elimination of brake dust make the daily ownership experience far more enjoyable, and the corrosion-proof rotors are ideal for Taiwan's humid climate.
1 thought on “Audi RS4 (B9)”
Camille Pons
Hello
I have a 2019 audi rs4 with ceramic disc in 400mm.
Could you provide me that ?
Im in France.
If yes, could you give me the price.
Thank you
Regards
Camille Pons