Audi S5 Downpipes – Catted & Decat Performance Exhaust Upgrades

Audi S5 Downpipes – Unleash the Full Potential of Your V6 TFSI Engine

The Audi S5 is a perfect balance of performance and elegance, available with both 3.0 TFSI supercharged and 3.0 TFSI turbocharged powerplants depending on the generation. While its stock configuration delivers great performance, the restrictive OEM downpipe limits exhaust flow and prevents the engine from reaching its full potential. Upgrading to a performance Audi S5 downpipe is one of the most effective modifications to gain horsepower, improve turbo spool, and unlock a deeper, motorsport-inspired exhaust note.

Why Upgrade to a Performance Audi S5 Downpipe?

The OEM downpipe is designed with emissions and noise regulations in mind, which restricts performance. Replacing it with a high-flow Audi S5 downpipe offers multiple benefits:

• Significant horsepower and torque gains – less backpressure allows the engine to breathe more freely.
• Faster turbo spool – quicker response, improved acceleration, and reduced lag.
• Enhanced exhaust sound – catted downpipes deliver a refined, sporty tone, while decat downpipes create an aggressive, motorsport-inspired roar.
• Lower exhaust gas temperatures – improved heat management during spirited driving.
• Perfect for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo builds.

Types of Audi S5 Downpipes

We offer a wide selection of Audi S5 performance downpipes to match different driving styles and tuning setups:

Catted Audi S5 Downpipes

Catted downpipes include a high-flow sports catalytic converter, balancing emissions compliance with enhanced performance. Perfect for street-driven cars in regions requiring emissions testing.

Decat Audi S5 Downpipes

Decat downpipes eliminate the catalytic converter entirely, providing maximum exhaust flow and ultimate performance. Best suited for track builds or areas without emissions restrictions.

Material Options: Stainless Steel & Titanium

The choice of material affects durability, weight, and thermal properties:

• Stainless steel downpipes – durable, corrosion-resistant, and budget-friendly.
• Titanium downpipes – ultra-lightweight, superior heat resistance, and premium motorsport aesthetics.

Engine Compatibility

Our Audi S5 downpipes are designed for seamless fitment across multiple generations and engine variants:

• Audi S5 B8 3.0 TFSI Downpipes – optimized for the supercharged V6 engine.
• Audi S5 B9 3.0 TFSI Downpipes – designed for the turbocharged V6 powertrain.
• Audi S5 4.2 V8 Downpipes – available for early-generation naturally aspirated models.

Performance Gains with Audi S5 Downpipes

Replacing the OEM downpipe with a performance Audi S5 downpipe delivers immediate, measurable performance improvements:

• +20–40 HP with a downpipe upgrade alone.
• +50–80 HP when combined with Stage 2 ECU tuning.
• Improved torque across the entire rev range.
• Sharper throttle response and reduced turbo lag.

Choosing the Right Diameter

Choosing the correct downpipe diameter is crucial for optimizing performance:

• 2.5-inch downpipes – ideal for Stage 1 setups and lightly tuned engines.
• 3-inch downpipes – perfect for Stage 2 upgrades, hybrid turbos, and high-boost applications.

All our Audi S5 downpipes are designed for direct bolt-on installation, ensuring seamless fitment without cutting or welding.

Build Quality & Engineering

Each performance Audi S5 downpipe is crafted to meet the highest quality standards:

• Mandrel-bent tubing for smooth, unrestricted exhaust flow.
• Precision TIG welding ensures strength and durability.
• OEM-style flanges and gaskets guarantee a perfect fit.
• Available in resonated and non-resonated options.

Tuning Potential

Pairing your Audi S5 downpipe with ECU tuning maximizes performance gains:

• Significant horsepower and torque increases.
• Optimized boost control and fueling strategies.
• Custom exhaust tone profiles depending on catted or decat configurations.

Daily Driving vs Track Builds

For daily-driven builds, catted downpipes offer a balanced mix of power and emissions compliance. For track-focused setups, decat downpipes deliver maximum exhaust flow, peak power, and a motorsport-inspired tone.

Conclusion

Upgrading to a performance Audi S5 downpipe is one of the most effective modifications for unlocking hidden power, improving turbo response, and enhancing exhaust tone. Whether you choose a catted or decat option, our selection of Audi S5 downpipes guarantees premium quality, precision fitment, and proven gains. Experience the full potential of your Audi S5 today.