94810602604 Exhaust Pipe Fits Porsche Cayenne 2003 2010 Models

94810602604 Exhaust Pipe: Applicable Models, Core Functions & On-Vehicle Role Analysis

This exhaust pipe is an original equipment (OE) dedicated component for the exhaust system of the 1st-generation Porsche Cayenne (chassis code: 9PA) primarily responsible for the functions of "efficient exhaust gas diversion + system sealing protection". Its applicable scope and on-vehicle value are as follows:
I. Precise Fit: Models, Years & Displacement
It is only compatible with all fuel-powered versions of the 1st-generation Porsche Cayenne (chassis code: 9PA), covering the full production cycle and all displacement variants. The specific parameters are as follows:
• Applicable Years: 2003–2010 (the only production cycle of the 1st-generation Cayenne);
• Specific Models & Displacement:
1. Cayenne Base Model: 3.2L V6 naturally aspirated engine (maximum power: 250 HP, engine model: M48.01), suitable for low-load exhaust requirements;
2. Cayenne S: 4.5L V8 naturally aspirated engine (maximum power: 340 HP, engine model: M48.02), matched to the exhaust gas flow of large-displacement naturally aspirated models;
3. Cayenne Turbo: 4.5L V8 twin-turbocharged engine (maximum power: 450 HP, engine model: M48.50), capable of withstanding high-temperature, high-flow exhaust gas from turbocharged models (exhaust outlet temperature: approximately 600℃);
4. Cayenne GTS (launched after 2007): 4.8L V8 naturally aspirated engine (maximum power: 405 HP, engine model: M48.03), suitable for the exhaust efficiency needs of high-performance tuned models;
5. Cayenne Diesel (2009–2010 models): 3.0L V6 turbocharged diesel engine (maximum power: 240 HP, engine model: M57.20), with an inner wall coated to resist diesel particulate adhesion, adapting to the exhaust characteristics of diesel models.
Incompatible Models: The 2nd-generation Cayenne (2011 onwards, chassis code: 92A), Macan, Panamera, and other models. Cross-model installation is prohibited due to completely different exhaust system layouts (e.g., pipe routing, interface size).
II. Core Functions: The "Efficient Diversion & Protection Hub" of the Exhaust System
As a key connecting component at the front end of the exhaust system, its functions revolve around "ensuring smooth exhaust gas discharge + protecting system stability", directly affecting engine performance and emission compliance:
1. Efficient Exhaust Gas Diversion & Reduced Exhaust Backpressure
The pipe adopts an equal-diameter streamlined design (inner diameter: 58mm, wall thickness: 1.8mm), which can smoothly guide exhaust gas from the exhaust manifold to the mid-section catalytic converter, reducing airflow resistance. Taking the 4.5T engine of the Cayenne Turbo as an example, the exhaust gas flow can reach 95L/s under high-load conditions (e.g., high-speed overtaking). This pipe can reduce exhaust backpressure by 18%, avoiding power loss (approximately 4–6 HP) caused by excessive backpressure. At the same time, it reduces the load of the engine’s exhaust stroke and improves combustion efficiency.
2. High-Temperature Resistance & Corrosion Protection
Made of 304 stainless steel, it has a high-temperature resistance limit of 650℃ and can withstand high-temperature exhaust gas (approximately 600℃) from the exhaust manifold outlet of turbocharged models for a long time. Compared with ordinary carbon steel pipes, its oxidation resistance is improved by 40%. The surface undergoes electrolytic polishing treatment, which can resist corrosion from rain, snow, and road deicing agents—especially suitable for snowy northern regions or coastal humid environments. Test data shows that its service life can reach 80,000–100,000 km under normal use (far exceeding the 50,000–60,000 km service life of ordinary steel pipes).
3. System Sealing & Vibration Damping
• Both ends of the pipe use a flange structure with conical sealing seats, paired with heat-resistant asbestos gaskets (heat resistance: 400℃), which can completely prevent exhaust gas leakage (leakage rate controlled within 0.1L/min). This avoids exhaust abnormal noise (especially noticeable at idle) and engine fault light activation caused by leakage;
• The middle section of the pipe is suspended and fixed by 3 rubber shock absorbers, which can absorb pipe displacement caused by engine vibration (maximum displacement: ±4mm). This prevents abnormal noise from collision between the pipe and chassis metal components, while reducing vibration-induced wear on the interface seal.
III. On-Vehicle Role: The "Key Front-End Connection Node" of the Exhaust System
In the vehicle’s exhaust system, this pipe is located at the core front-end connection position and serves as the "necessary channel" for exhaust gas to flow from the engine to the aftertreatment system. Its specific on-vehicle roles are reflected in three aspects:
1. Connecting Core Components to Build an Exhaust Path
Installed under the left longitudinal beam of the chassis, one end is rigidly connected to the exhaust manifold (exhaust outlet of the engine block) via a flange, and the other end is connected to the mid-section catalytic converter via flexible rubber hangers. This forms a complete exhaust path: "Engine → Exhaust Manifold → 94810602604 Pipe → Catalytic Converter → Muffler". It ensures orderly exhaust gas discharge and avoids reduced combustion efficiency caused by exhaust gas retention in the cylinder block.
2. Cooperating with Emission Control to Ensure Compliance
A oxygen sensor mounting boss is reserved in the middle section of the pipe, allowing installation of a front oxygen sensor (to monitor oxygen concentration in exhaust gas). This provides real-time data to the engine’s ECU (Engine Control Unit) to optimize fuel injection volume (error controlled within ±0.3ms), ensuring exhaust emissions comply with Euro IV, US EPA, and other emission standards. For example, the Cayenne Diesel model relies on this sensor’s data to adjust fuel injection volume and avoid excessive nitrogen oxide emissions.
3. Adapting to Complex Working Conditions to Stabilize Exhaust Performance
• Off-road Scenarios: The pipe’s height from the ground is approximately 210mm, meeting the ground clearance requirements for light off-roading. Meanwhile, the rubber shock absorbers can cushion impacts from bumpy roads to prevent pipe deformation;
• High-Load Scenarios (e.g., towing, climbing): The equal-diameter design prevents vortex formation of exhaust gas inside the pipe, ensuring smooth discharge of high-flow exhaust gas and maintaining stable engine power output. For instance, when the Cayenne Turbo tows a 1.5-ton load, the exhaust backpressure can still be controlled within 0.3bar, with power attenuation not exceeding 8%;
• Low-Temperature Scenarios: The low thermal conductivity of stainless steel reduces heat loss of exhaust gas during pipe transmission, helping the catalytic converter quickly reach its operating temperature (approximately 300℃). This shortens the period of excessive emissions after cold starts (from 2 minutes to 1.2 minutes).
IV. Fault Impacts & Replacement Recommendations
If the pipe develops cracks, interface seal failure, or other issues, it will directly cause:
• Exhaust abnormal noise (a "puffing" sound at idle, increased noise during acceleration);
• Exhaust gas leakage, triggering the engine fault light (fault codes such as P0420 related to catalytic converter efficiency);
• Long-term leakage will cause chassis components (e.g., fuel tank, fuel pipes) to be baked by high-temperature exhaust gas, posing safety hazards.
Recommendation: After the vehicle has traveled 60,000 km or been used for 5 years, regularly inspect the pipe surface for rust and cracks, and check if the interface gaskets are aged. If the above fault symptoms occur, replace the pipe in a timely manner. OE parts offer the best compatibility; for aftermarket parts, ensure they are labeled "Fits Cayenne 9PA 2003–2010".