Audi RS5 2.9T Sport Exhaust System
The Audi RS5 is powered by a 2.9-liter twin-turbo V6 that delivers strong factory performance, but the original exhaust system keeps the car much quieter and more restrained than its RS identity suggests. The factory system is designed around comfort, noise control, and broad-market refinement. While that works well for everyday driving, it limits the emotional character of the car and restricts how freely the engine can express itself under throttle.
The (product name)Yonristic Performance RS5 Valved Cat-Back performance exhaust system is built to completely change that experience. This is one of the most aggressive cat-back exhaust setups available for the RS5 platform, designed for drivers who want their car to sound sharper, deeper, and more performance-focused.
The system starts with a full front-pipe section that connects from the factory downpipe area and carries exhaust flow into a larger 3.5-inch stainless steel midpipe. This oversized main section provides significantly more flow capacity than the factory exhaust path, reducing restriction and allowing the twin-turbo V6 to breathe more freely. By increasing the main exhaust diameter where exhaust volume is highest, the system supports stronger flow under acceleration and high-load driving.
From the 3.5-inch midpipe, the exhaust transitions into a dual 2.75-inch Y-pipe design. This layout is engineered to balance two important goals: maximum flow and proper exhaust control. A system that is too small can restrict the engine and limit sound output, while a system that is oversized in every section can lose exhaust velocity and create a loose, hollow tone. The Yonristic 3.5-inch-to-dual-2.75-inch stainless steel architecture gives the RS5 the flow it needs while preserving the backpressure and exhaust speed needed for strong sound quality and clean throttle response.
The Y-pipe section is designed to split the exhaust flow smoothly into both rear sections. Instead of using an abrupt transition, the system follows a more controlled path that helps maintain flow consistency and reduce unnecessary turbulence. This gives the exhaust a cleaner tone, stronger volume, and a more refined aggressive character compared with a simple straight-pipe or muffler-delete setup.
At the rear, the system features valved muffler sections with remote active valve control. With the valves closed, the exhaust tone remains more controlled for cold starts, neighborhood driving, cruising, and highway use. With the valves open, the system unlocks its most aggressive sound mode, giving the RS5 a louder, deeper, and more dramatic exhaust note under throttle.
This remote-controlled valve setup gives the driver direct control over the exhaust sound at any time. Instead of relying on factory drive modes or OEM valve logic, the included remote system allows the valves to be commanded open for maximum sound or closed for a more refined driving experience.
The complete system finishes with real RS-style oversized quad exhaust tips. These tips are larger, more aggressive, and more performance-oriented than the factory appearance, giving the rear of the RS5 a stronger visual presence. Available finishes include gloss black, carbon fiber, and satin silver, allowing owners to match the exhaust to their vehicle’s exterior style.
Every system is engineered for direct bolt-on installation. No cutting, welding, or permanent modification is required. The exhaust is designed to align with the factory mounting locations and provide clean fitment from the front pipe section all the way to the rear tips.
For customers who want to take the build further, Yonristic also offers optional downpipe upgrades in free-flow, 200-cell, and 400-cell configurations. These downpipes can be paired with the cat-back system to further increase turbo response, sound output, and overall performance potential.
3.5-Inch Midpipe Flow Architecture
The heart of the system is the enlarged 3.5-inch midpipe. On a twin-turbo platform like the RS5, exhaust gases from both turbochargers need a low-restriction path once they enter the main exhaust section. The larger midpipe increases overall flow capacity and helps reduce the restriction created by the smaller factory exhaust layout.
This is especially important on tuned vehicles or cars running upgraded downpipes. As boost, airflow, and exhaust volume increase, the factory cat-back becomes a greater limitation. The Yonristic 3.5-inch midpipe gives the system the volume needed to support higher output while also improving sound presence.
The result is a more open, more aggressive, and more responsive exhaust character. Under light throttle, the car feels refined and controlled. Under hard acceleration, the larger midpipe allows the system to open up with a much stronger RS sound.
Dual 2.75-Inch Y-Pipe Design
After the 3.5-inch midpipe section, the exhaust transitions into a dual 2.75-inch Y-pipe layout. This section is designed to maximize flow while still maintaining the proper exhaust velocity and pressure behavior needed for strong sound quality.
The dual 2.75-inch configuration gives each rear section enough capacity to support the RS5’s twin-turbo V6 without making the system overly loose or uncontrolled. This balance is what gives the exhaust its aggressive but clean tone.
The Y-pipe layout also helps create a more unified exhaust note. Rather than producing a flat or disconnected sound, the transition allows the system to develop a fuller and more powerful tone through the midrange and upper RPM range.
Remote Active Valve Control
The Yonristic RS5 system comes standard with remote-controlled active valves for maximum sound control. This setup gives the driver direct command over the exhaust tone without depending on factory drive-mode programming.
With the valves closed, the system routes sound through the more controlled section of the mufflers, making the car more comfortable for daily driving, cruising, early-morning starts, and highway use.
With the valves open, the system activates its freer-flowing sound path, giving the RS5 a much louder and more aggressive exhaust note. This is the mode designed for maximum sound, stronger throttle emotion, and the most dramatic driving experience.
For customers who prefer factory valve integration, OEM valve control may be available upon request. Please email Yonristic Performance or DM us on Instagram before ordering to confirm compatibility and configuration.
Optional Downpipe Upgrades
For customers looking to build a more complete performance exhaust setup, this cat-back system can be paired with Yonristic downpipes.
Available downpipe options include:
Free-Flow Downpipes
The most aggressive option for maximum flow, strongest sound, and highest performance potential. Best suited for off-road or track-focused builds.
200-Cell High-Flow Catted Downpipes
A performance-focused catted option that offers significantly improved flow over factory, stronger turbo response, and a louder exhaust character while retaining catalytic cores.
400-Cell High-Flow Catted Downpipes
A more refined catted option designed for customers who want better flow and sound than factory while keeping a cleaner and more daily-friendly character than the 200-cell version.
Pairing downpipes with the Yonristic cat-back system gives the RS5 a much more complete exhaust transformation. The car gains stronger turbo presence, sharper sound, improved flow, and a more aggressive tone throughout the RPM range.
Real RS-Style Exhaust Tips
The rear of the RS5 deserves an exhaust outlet that matches the car’s performance identity. This system includes real oversized RS-style exhaust tips designed to give the rear bumper a wider, more aggressive, and more premium appearance.
Unlike small factory-style outlets or decorative trim covers, these tips create a true performance look that matches the upgraded sound of the system.
Available tip finishes include:
Gloss Black
A clean, aggressive finish that pairs perfectly with black optics packages, dark wheels, and stealth-style builds.
Carbon Fiber
A motorsport-inspired option with a premium woven finish and a more exotic appearance.
Satin Silver
A refined metallic finish that gives the RS5 an OEM-plus performance look with a clean, timeless style.
The tips are designed for proper alignment and a bold rear-end presence, completing the transformation from restrained factory exhaust to aggressive RS performance system.
Three Unique Features
3.5-Inch Oversized Midpipe
The enlarged 3.5-inch midpipe provides significantly more flow capacity than the factory exhaust layout. This helps reduce restriction after the downpipe section, supports tuned power levels, and gives the RS5 a louder, deeper, and more open exhaust character under throttle.
Dual 2.75-Inch Y-Pipe Balance
The dual 2.75-inch Y-pipe design is engineered to maximize flow while preserving the exhaust velocity and pressure behavior needed for clean sound quality. This creates a stronger, fuller tone without making the car sound hollow, loose, or uncontrolled.
Remote-Controlled Valved Sound
The included remote valve system allows the driver to control the exhaust sound directly. Closed valves keep the RS5 more refined for daily driving, while open valves unlock the system’s most aggressive sound mode for maximum volume, drama, and throttle response.
Performance Benefits
The Yonristic Performance RS5 Valved Cat-Back Exhaust System is designed to improve:
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Exhaust flow capacity
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Throttle response feel
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Turbo sound presence
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Midrange exhaust volume
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High-RPM sound clarity
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Overall exhaust tone and aggression
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Rear-end visual presence
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Performance potential with downpipes and ECU tuning
Estimated gains will vary depending on vehicle condition, downpipe setup, ECU calibration, fuel quality, and supporting modifications.
Estimated Cat-Back Gains:
+8 – 15 HP
+8 – 15 lb-ft Torque
Estimated Gains with Downpipes and ECU Tune:
+25 – 45 HP
+30 – 55 lb-ft Torque
Final results depend on the complete build setup and dyno conditions.
Key Specifications
Product Type
Valved cat-back exhaust system
Vehicle Platform
Audi RS5 B9 / B9.5
2.9L twin-turbo V6
Exhaust Layout
Full front-pipe-to-tip cat-back system
3.5-inch main midpipe
Dual 2.75-inch Y-pipe rear section
Valved rear muffler design
Valve Control
Remote active valve control included
OEM valve control available upon request
Email or DM Yonristic Performance before ordering for OEM control configuration
Tip Options
Gloss black RS-style tips
Carbon fiber RS-style tips
Satin silver RS-style tips
Downpipe Options
Free-flow downpipes
200-cell high-flow catted downpipes
400-cell high-flow catted downpipes
Installation
Direct bolt-on installation
No cutting required
No welding required
Uses factory-style mounting locations
Professional installation recommended
Vehicle Fitment
Audi RS5 Coupe 2.9T — 2018–2024
Audi RS5 Sportback 2.9T — 2019–2025
Platform: B9 / B9.5
Engine: 2.9L twin-turbo V6
Fitment may vary by market, body style, and production year. Please confirm vehicle year, body style, and exhaust configuration before ordering.
Tuning & Check Engine Light Notice
The cat-back exhaust system itself does not replace the factory catalytic converters. However, optional downpipe upgrades may affect emissions-related monitoring depending on the chosen configuration, vehicle software, and local regulations.
ECU tuning is recommended when installing free-flow or high-flow downpipes for best performance, drivability, and long-term reliability. Check engine lights may occur depending on the downpipe option, catalyst configuration, and ECU calibration.
Off-Road Use Disclaimer
This product is intended for off-road and track use only where applicable. Optional downpipe upgrades, especially free-flow and high-flow catalyst configurations, may modify emissions-related components and may not be legal for street use in certain states, regions, or countries.
Customers are responsible for checking all local, state, and federal emissions laws before purchasing, installing, or using this product. Yonristic Performance does not guarantee emissions compliance, inspection approval, or road legality for any modified exhaust or downpipe configuration.
