PORSCHE Cayenne 957 4.8 V8 Downpipe Exhaust System(2007-2010)

Maximize Exhaust Velocity & V8 Acoustic Power — CEES Porsche Cayenne 957 4.8 V8 Performance Downpipe System

Unleash the true performance potential and deep, unrestricted acoustic rumble of your SUV with the CEES Performance Downpipe Exhaust System, precision-engineered exclusively for the Porsche Cayenne 957 4.8L V8 (2007–2010). Designed specifically for the high-displacement 4.8L naturally aspirated V8 (Cayenne S / GTS) and 4.8L Twin-Turbo V8 (Cayenne Turbo / Turbo S) platforms, this high-flow downpipe and secondary cat bypass system drastically minimizes exhaust backpressure directly downstream of the exhaust manifolds, delivering sharper throttle response, faster turbo spool, and intoxicating V8 sound.

🚀 Engineering Highlights

• Massive Backpressure Reduction: Replaces restrictive factory catalytic converters with smooth, mandrel-bent oversized piping. Enables rapid exhaust evacuation, significantly lowers engine bay temperatures, and unlocks higher horsepower and torque gains.
• Selectable Catalyst Configurations: Available in race-proven Catless / Decat for maximum flow and raw V8 volume, or with high-efficiency High-Flow Catted (100 / 200 / 300 Cell) sports catalysts to balance high flow with reduced exhaust odor.
• Track-Grade T304 Stainless Steel: Mandrel-bent from heavy-duty, heat-resistant T304 stainless steel with precision TIG welds and thick CNC-machined flanges to guarantee exceptional structural rigidity and lifetime corrosion resistance under extreme track and towing heat.
• Complimentary O2 Sensor Spacers (CEL Fix Included): High-flow and catless downpipes alter exhaust velocity past secondary O2 sensors, which may trigger a Check Engine Light (CEL). To suppress warning light issues, CEES includes 2 complimentary O2 sensor spacers (CEL Fix) with every order.
• 100% Bolt-On Fitment: 3D laser-scanned to original Porsche factory chassis geometry. 100% bolt-on installation allows a return to stock at any time without cutting or welding.

📊 Technical Specifications

✨ Bespoke Your Build — Chat with Our Specialists on WhatsApp

• WhatsApp: +86 15626172519
• Email: cees-exhaust@qq.com

📦 Shipping & Lead Times

• 🛠️ Production Time: Built to order in 2–4 weeks (in-stock options ship in 6–12 business days)
• 🚚 Shipping: Premium express via DHL / FedEx / UPS — estimated 7–15 business days to your door
• 📦 Free shipping

FAQ

1. What is the difference between Catless and High-Flow Catted (100/200/300 Cell)?

Catless (Decat) removes all catalytic restrictions to provide the lowest exhaust backpressure, fastest turbo spool, and loudest V8 rumble. High-Flow Catted options (100, 200, or 300 cell metallic cores) maintain high exhaust velocity while effectively reducing exhaust gas smell.

2. Will installing this downpipe trigger a Check Engine Light (CEL)?

Because high-flow and catless downpipes alter exhaust gas velocity across the secondary O2 sensors, there is a chance of triggering a Check Engine Light (CEL). To prevent this, CEES includes 2 complimentary O2 sensor spacers (CEL Fix) in the package to space the secondary oxygen sensors out of the direct high-velocity stream and suppress warning lights.

3. Is cutting or welding required to fit my Porsche Cayenne 957?

No. Every CEES downpipe and secondary cat bypass pipe is manufactured to exact factory 3D-scanned specifications and connects directly to factory mounting points and exhaust flanges.

4. Are you a direct manufacturer?

Yes — CEES Exhaust is a direct manufacturer based in Guangdong, China. We design, laser-scan, bend, and hand-weld every exhaust component in our factory with rigorous quality inspection.