

Performance Exhaust Downpipe w/ Heat Shield - Audi S4 S5 B9 3.0T
The Performance Exhaust Downpipe with Heat Shield for the Audi S4 S5 B9 is a precision-engineered upgrade designed to significantly enhance the performance and efficiency of your vehicle. Crafted from high-quality materials, this downpipe improves exhaust flow, reduces turbo lag, and maximizes power output, delivering a more responsive and exhilarating driving experience. The integrated heat shield offers optimal protection to sensitive engine components from heat exposure, ensuring longevity and reliable performance in all conditions. This downpipe is the perfect solution for Audi enthusiasts seeking to unlock the full potential of their S4 or S5 B9.
Key Features:
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Premium Construction: Manufactured from high-grade materials, this performance downpipe is built to withstand high temperatures and harsh conditions. Its robust design ensures durability, providing a long-lasting upgrade that stands up to the performance demands of high-output engines like those in the Audi S4 and S5 B9.
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Optimized Exhaust Flow: By reducing the restrictions of the factory downpipe, this performance component enhances exhaust flow, allowing the engine to expel gases more efficiently. This results in improved turbo spool-up, faster throttle response, and an overall increase in engine efficiency, leading to noticeable gains in horsepower and torque.
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Integrated Heat Shield: The included heat shield offers essential protection for the downpipe and nearby engine components. By preventing excessive heat soak, the heat shield helps safeguard critical components such as the turbocharger and engine wiring, ensuring optimal performance even during high-stress driving situations.
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Increased Power Output: With improved exhaust flow and reduced backpressure, this downpipe unlocks more horsepower and torque from your Audi S4 S5 B9. The enhanced airflow contributes to faster acceleration, a more responsive throttle, and a more dynamic driving experience, particularly in higher RPM ranges.
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Aggressive Exhaust Tone: Replacing the factory downpipe provides a more aggressive exhaust sound that is deeper and more pronounced. This upgrade enhances the overall driving experience by providing a more motorsport-inspired exhaust note, adding character and excitement to the sound of your vehicle.
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OEM-Level Fitment & Easy Installation: Designed for a perfect fit on the Audi S4 S5 B9, this performance downpipe requires no modifications to the vehicle. The kit comes with all necessary hardware and instructions, allowing for straightforward installation, whether you're performing the upgrade yourself or working with a professional technician.
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Improved Turbo Efficiency: The improved airflow provided by this downpipe allows the turbo to spool more quickly and efficiently. This reduces turbo lag and improves throttle response, making your Audi S4 S5 B9 feel more agile and responsive on the road.
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Motorsport-Inspired Performance: This downpipe is engineered with motorsport-level performance in mind, offering a significant performance boost that meets the demands of high-performance driving. Whether on the street or the track, the downpipe provides an aggressive upgrade that enhances both performance and the overall driving experience.
The Performance Exhaust Downpipe with Heat Shield for the Audi S4 S5 B9 is a high-performance upgrade that delivers substantial gains in power, efficiency, and driving dynamics. With its durable construction, improved exhaust flow, integrated heat shield, and enhanced turbo response, this downpipe ensures a more responsive, thrilling driving experience. Perfect for those looking to elevate their Audi S4 or S5 B9 with a more aggressive exhaust note and noticeable performance improvements, this downpipe is a must-have for serious enthusiasts seeking the ultimate in driving excitement and efficiency.
We want you to have our parts as quickly as possible. Products that are in stock will be shipped and delivered domestically in 1–5 business days. It will take seven to twenty-one business days for international shipment. An email confirming that your order is being completed will be sent to you once you place it. For in-house orders, please allow a day for processing and the updating of the tracking number. The product page accurately shows the quantity.
Custom steering wheels typically take 20-25 business days for production, with an additional 5-7 business days for shipping. Production and delivery times may vary depending on the complexity of the order and the shipping destination. For more details, please refer to our Shipping Policy.
Our Return Policy permits returns only for products that are found to be defective. You have 30 days from the date of delivery to inspect the product and report any issues.
Regular Cleaning: Maintain carbon fiber parts by cleaning them regularly with a soft cloth and a mixture of mild soap and water. Avoid abrasive or harsh cleaners that could harm the finish.
Use Microfiber Pads and Cloths: Opt for microfiber pads and cloths when cleaning or applying protective coatings to prevent surface scratches.
Protect from Sun and Chemicals: Limit exposure to direct sunlight and harsh chemicals, as they can damage carbon fiber. When possible, use protective covers or park your vehicle in shaded areas.

Why Thousands of Enthusiasts Trust Us
Carbon Industries delivers premium, precision-engineered parts that elevate Vehicle performance and style—backed by expert support and a true passion for the culture. We don’t just sell parts; we fuel the lifestyle.
- Guaranteed Fitment for Your BMW: No guesswork—our parts are designed and tested to fit your exact model perfectly.
- Premium Materials, Always: We use only high-grade carbon fiber, forged metals, and performance-tested components.
- White-Glove Customer Support: Our team of BMW specialists is here to guide you with expert, concierge-level care.
- Trusted by the Elite Vehicle Community: From daily drivers to show builds, our parts are featured on some of the cleanest builds worldwide.

Let customers speak for us
FAQ
Will these parts fit my specific Vehicle model and year?
Yes — every product page includes a “Will This Fit” section to ensure compatibility. If you’re unsure, just send us your VIN or model/year, and our team will confirm fitment for you within 24 hours. We specialize in BMW and European vehicles, so you’re in good hands.
Are these genuine carbon fiber or carbon fiber overlay parts?
We offer only full carbon fiber options. Each listing clearly specifies the construction material. Rest assured, we only source high-quality parts that are durability-tested and made to OEM or better standards.
How long does shipping take and where do you ship from?
Most orders ship from our Irvine, CA warehouse within 1–3 business days. Domestic delivery typically takes 3–7 business days. International shipping times vary by country. Each product page includes real-time shipping estimates based on your location. Certain made to order products will take up to 3-4 weeksfor delivery, including production time.
Do I need professional installation or can I install it myself?
Many of our mods are designed for direct bolt-on installation and can be installed at home with basic tools. However, for certain parts like aero kits or performance components, we recommend professional installation for best results. Each product page includes install difficulty and notes. We offer professional installation at our Santa Clara, CA location.
What if the product doesn’t fit or I change my mind?
No worries — we offer hassle-free returns within 30 days of delivery. If the part doesn’t fit due to an error on our end, we’ll cover the return shipping. For all other returns, we make it easy to exchange or get a refund. See our full Returns & Warranty Policy for details.
Are your parts tested for quality and durability?
Absolutely. All of our products go through quality control checks and are either TUV-certified, ISO-certified, or tested by our in-house team and verified installers. We don’t sell anything we wouldn’t put on our own cars.
Do you offer warranties on your parts?
Yes. Most of our products come with a 90-day limited warranty against manufacturing defects. Some premium items offer extended warranties — details are listed on the product pages. We’re committed to quality and stand behind what we sell.
Can I finance or pay in installments?
Yes — we offer Shop Pay, Affirm, AfterPay, and Klarna at checkout. You can split your purchase into 4 interest-free payments or choose longer-term plans if needed. It’s quick, easy, and won’t affect your credit score (in most cases)