Audi C8 RS6 / RS7 400 Cell Catted Downpipes
Audi C8 RS6 / RS7 400 Cell Catted Downpipes
SKU:AUD.C8.RS6.FF.400C.BR
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Audi C8 RS6 / RS7 – EPA-Compliant 400 Cell Catted Downpipes
Engineered for the 4.0T Twin-Turbo V8 • High-Flow • Compliant •
Introducing Our NEW 400 Cell EPA-Compliant Downpipes for C8 RS6 / RS7
The Audi C8 RS6 and RS7 combine executive refinement with supercar-level performance, powered by the formidable 4.0T twin-turbo V8. While factory catalysts restrict exhaust flow and mute the engine’s full character, our NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce backpressure, enhance turbo efficiency, and unlock a deeper, more commanding exhaust tone — all while maintaining emissions compliance standards.
This upgrade forms the foundation of serious 4.0T performance.
Why Upgrade to 400 Cell?
- EPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust efficiency while maintaining compliance standards.
- Improved Turbo Spool & Mid-Range Response: Reduced restriction sharpens throttle input and power delivery.
- Enhanced Exhaust Character: Deeper tone with stronger turbo acoustics and more pronounced high-RPM presence.
- Street & Performance Balanced: Noticeable gains without compromising daily refinement.
Performance & Engineering
- Optimized Flow Architecture: Minimizes backpressure while preserving catalyst efficiency.
- Mandrel-Bent Tubing: Smooth internal transitions for maximum exhaust velocity.
- Precision TIG Welding: Built to endure sustained high exhaust temperatures and boost levels.
- Direct OEM Bolt-On Installation: Utilizes factory mounting locations for straightforward installation.
- Engineered to Pair Seamlessly with Valvetronic Exhaust Systems
Sound Transformation
- Stock Exhaust + Downpipes: Noticeable increase in depth and turbo presence with enhanced exhaust clarity.
- Valvetronic Exhaust + Downpipes: Maximum transformation — stronger presence, sharper transitions, and a true Audi Sport-inspired signature.
Construction & Durability
- Premium high-grade stainless steel construction
- High-temperature resistant 400 cell catalyst cores
- OEM-style sensor placement for proper operation
- Engineered for long-term reliability under high-performance conditions
Unleash the full potential of your C8 RS6 or RS7 — starting at the source.
Level of Difficulty
Level of Difficulty
Shipping & Returns
Shipping & Returns
We ship all products from the United States, and use UPS, FedEx, USPS and local couriers.
If you are unhappy with this product, you can return it to us within 30 days for a refund or store credit.
Third Party Disclaimer
Third Party Disclaimer
This product is designed, tested, and manufactured by a third-party vendor. This includes products branded as Speedlogix for marketing purposes. While some items carry the Speedlogix name, it is not produced in-house by Speedlogix. We work closely with our manufacturing partners to ensure products meet our quality standards, but warranty coverage and product performance responsibilities remain with the original manufacturer. For warranty claims, technical support, or product-related issues, please contact our customer service team via Live Chat who will facilitate communication with the manufacturer or provide manufacturer contact information as needed. By purchasing any items branded as Speedlogix, you acknowledge that the product is manufactured by a third party and warranty obligations lie with the original manufacturer.
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