What vehicles does the Fi Exhaust B9 RS4 system fit?

It's built specifically for the pre-facelift B9 Audi RS4 and RS5, model year 2019 and newer, with the 2.9L TFSI V6 — a direct bolt-on replacement, no cutting or modification required.

What is the Fi Exhaust B9 RS4 system, and how does it work?

It's a valvetronic catback exhaust with a mid X-pipe configuration and 70mm-diameter piping. When the valves are closed, exhaust gases route through the muffler for a low-profile, comfortable daily drive; open valves deliver a louder, sportier soundtrack.

What is the exhaust made from?

T304 stainless steel construction throughout, with individually designed muffler internals.

What tip finishes are available?

Dual silver tips come standard, with dual matte black tips available as an upgrade — both engraved with the Fi Exhaust logo.

Are downpipes available, and will they increase horsepower?

Yes. Ultra-high-flow Race Downpipes (approximately 5.08 kg) are offered, along with a gold ceramic coated version and Sport Cats in a 200-cell option. Fi Exhaust reports an average horsepower increase of 5 to 10%, along with improved torque, with the complete system fitted in comparison to Factory Equipment.

Can I control the valves remotely?

The system retains OEM valve control through the car's factory exhaust/sport button or drive mode selector by default. It can be upgraded to the Fi Exhaust Pro Control System for app-connected remote control on supported models.

Description

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BP PRICING DIFFERENCE

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Description

Fi Exhaust Valvetronic Exhaust System for B9 Audi RS4 and RS5

Fi Exhaust B9 RS4 system is a valvetronic exhaust designed as a direct bolt-on replacement for the pre-facelift B9 Audi RS4 and RS5, built from high-grade T304 stainless steel for durability and a dynamic soundtrack. Fi Exhaust’s valvetronic technology allows precise control over airflow and sound volume while enhancing overall performance and torque; when run as a complete system with the valvetronic catback and ultra-high-flow downpipe, it typically increases horsepower by 5-10%. With the valves closed, exhaust gases route through the muffler for a subdued, comfortable driving experience; fully open, the system produces an intense, sporty exhaust note. Custom-designed muffler internals, engineered specifically for this chassis, deliver the distinct sound and performance this system is built for.

Valve

All Fi Exhaust systems feature valvetronic technology, designed to regulate sound volume while enhancing overall vehicle performance. Prior to this innovation, achieving both high horsepower and torque simultaneously was a significant challenge in exhaust system design. Valvetronic technology resolves this issue, enabling sports cars to deliver exceptional torque at low RPMs and impressive horsepower at high RPMs.

Features

Valvetronic technology for precise, on-demand sound control
High-grade T304 stainless steel construction throughout
Increases horsepower by 5-10% when run with the complete system
Custom-designed muffler internals, engineered for this chassis
Retains OEM valve control through the factory sport button or drive modes
Sport and race downpipes available as separate options
Matte black tip finish available as an upgrade over the standard stainless tips

What’s Included

Mid-pipe
Valvetronic muffler

Applications

Audi RS4: B9 | 2019-present | 2.9L V6 TFSI
Audi RS5: B9 | 2019-present | 2.9L V6 TFSI

Notes

Retains OEM valve settings: No remote
Stainless steel tips are standard

Frequently Asked Questions

What vehicles does the Fi Exhaust B9 RS4 system fit? It’s built specifically for the pre-facelift B9 Audi RS4 and RS5, model year 2019 and newer, with the 2.9L TFSI V6 a direct bolt-on replacement, no cutting or modification required.
What is the Fi Exhaust B9 RS4 system, and how does it work? It’s a valvetronic catback exhaust with a mid X-pipe configuration and 70mm-diameter piping. When the valves are closed, exhaust gases route through the muffler for a low-profile, comfortable daily drive; open valves deliver a louder, sportier soundtrack.
What is the exhaust made from? T304 stainless steel construction throughout, with individually designed muffler internals.
What tip finishes are available? Dual silver tips come standard, with dual matte black tips available as an upgrade both engraved with the Fi Exhaust logo.
Are downpipes available, and will they increase horsepower? Yes. Ultra-high-flow Race Downpipes (approximately 5.08kg) are offered, along with a gold ceramic coated version and Sport Cats in a 200-cell option. Fi Exhaust reports an average horsepower increase of 5 to 10%, along with improved torque, with the complete system fitted in comparison to Factory Equipment.
Can I control the valves remotely? The system retains OEM valve control through the car’s factory exhaust/sport button or drive mode selector by default. It can be upgraded to the Fi Exhaust Pro Control System for app-connected remote control on supported models.

About Fi Exhaust

Fi Exhaust is a premier aftermarket automotive exhaust brand specializing in high-performance systems for supercars, sports cars, and luxury vehicles. Serving renowned marques such as Lamborghini, Ferrari, McLaren, Porsche, Mercedes-AMG, BMW M, Audi, and Nissan, Fi Exhaust is dedicated to delivering superior sound and performance. The brand’s research and development team consistently engineers exhaust systems designed to perform flawlessly under all conditions, catering to enthusiasts who demand both exceptional sound and optimized performance. Each exhaust system is meticulously crafted to produce a distinctive tone, ranging from deep bass to an exotic, high-pitched, motorsport-inspired sound tailored to each vehicle model. Every system undergoes extensive testing and precise sound tuning to achieve peak performance and integrate seamlessly with the intelligent control system.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Fi EXHAUST Valvetronic Exhaust System for B9 Audi RS4 & RS5

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Fi Exhaust Valvetronic Exhaust System for B9 Audi RS4 and RS5

Valve

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About Fi Exhaust

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