My Cart
Your Shopping Cart is Empty
Authorized Dealer
Valvetronic Designs Porsche Cayenne Turbo S/GT/GTS 400 Cell Catted Downpipes
$5,600.79 CAD
Authorized Canadian dealer · Full manufacturer warranty
🇨🇦CanadaSpecial Order
🇺🇸USASpecial Order
Ships directly from manufacturer
🛡️Authorized DealerGenuine product & warranty
🔒Secure CheckoutSSL encrypted payment
↩️Easy ReturnsReturn policy
🚗
Will this fit your vehicle?Verify fitment for your exact year, make & model
Description
Special order.
Porsche Cayenne Turbo S / GT / GTS – EPA-Compliant 400 Cell Catted Downpipes
Precision Engineered for the 4.0L Twin-Turbo V8 • High-Flow Performance •
Introducing Our NEW 400 Cell EPA-Compliant Downpipes for Cayenne
The Porsche Cayenne Turbo platform is a masterclass in performance engineering. However, factory catalyst restrictions limit the full efficiency and character of its 4.0L twin-turbo V8. Our NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce exhaust restriction, improve turbo response, and refine the exhaust note — all while maintaining emissions compliance standards.
Designed specifically for the Cayenne Turbo S, Turbo GT, and GTS, these downpipes elevate the driving experience while preserving the precision Porsche is known for.
Why 400 Cell?
EPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust efficiency while maintaining compliance standards.
Improved Turbo Response: Reduced backpressure sharpens throttle input and mid-range delivery.
Refined Yet Aggressive Sound: Deeper tone with enhanced clarity at higher RPM.
Maintained Daily Comfort: Performance gains without sacrificing drivability.
Engineering & Performance
Optimized Flow Design: Reduces restriction while preserving catalyst efficiency.
Mandrel-Bent Tubing: Smooth internal transitions for consistent exhaust velocity.
Precision TIG Welding: Built to endure high temperatures and sustained boost pressure.
Direct OEM Bolt-On Installation: Utilizes factory mounting locations.
Engineered to Pair with Valvetronic Exhaust Systems
Sound Profile
Stock Exhaust + Downpipes: Noticeable increase in depth and presence without overwhelming cabin refinement.
Valvetronic Exhaust + Downpipes: Sharper response, increased volume, and a more motorsport-inspired character while retaining Porsche composure.
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
Elevate the performance and sound of your Porsche Cayenne — engineered with precision, starting at the source.
Application and configuration
Select the exact manufacturer configuration below. The selected configuration determines the supplied parts, material, tips and vehicle application; optional parts are included only when stated in that selection.
| Manufacturer configuration | Part number |
|---|---|
| Default Title | LAM.AUD.URUS.RSQ8.FF.400C.BR |
Shipping & Delivery
Ships from our Canadian or US warehouse depending on stock. In-stock items ship within 1–3 business days with tracking. Special-order items ship directly from the manufacturer. Oversized freight items may require curbside delivery.
Returns & Warranty
Full manufacturer warranty as an authorized dealer. See our Returns & Exchanges policy for eligibility and process.
Need Help? Ask a Specialist
Questions about fitment, compatibility, or install? Email sales@foreignautomotive.ca or call (519) 894-9551 — we answer within one business day.
Secure Checkout
Visa
Mastercard
Amex
Interac
Affirm
Shop Pay