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Hoses / Pipes / Sleeves
The Genuine Porsche 92811022400 hose is a factory vacuum / air guide hose for Porsche 928 S4, GT and GTS 1987–1995 models. It fits from the left “Y” at the air guide elbow to the brake venturi / suction jet pump air guide system, helping maintain correct vacuum routing, intake sealing and brake vacuum assist function. Ideal for replacing cracked, hardened or leaking original hoses while preserving Genuine Porsche fitment and quality.
Fits:
Porsche 928 S4 / GT 1987 - 1991
* Engine code: 2841 / 2842 / 2847
Porsche 928 GTS 1992 - 1995
* Engine code: 2849 / 2850
Diagram ref no 10
This hose is associated with the left “Y” at the air guide elbow to brake venturi connection on Porsche 928 S4 / GT / GTS models.
What This Part Does / Functions
• Routes vacuum / intake air between the air guide elbow and brake venturi circuit
• Connects at the left “Y” fitting in the engine air guide system
• Supports correct suction jet pump / brake venturi operation
• Helps maintain proper brake vacuum assist system function
• Helps keep the intake and vacuum system sealed
• Replaces a cracked, hardened, split or collapsed original hose
• Provides correct Genuine Porsche hose shape, routing and fitment
• Helps prevent vacuum leaks and related engine running issues.
Why Replace This Part?
Vacuum and air guide hoses on the Porsche 928 are exposed to heat, engine movement, oil vapour, intake vacuum and age-related rubber deterioration. Over time, the hose can harden, split, crack, collapse or become loose at its connection points. A leaking hose in this area can affect the intake vacuum circuit and brake venturi / suction jet pump system. This may lead to poor idle quality, vacuum loss, reduced brake assist performance or general intake air leak symptoms. Replacing it with a Genuine Porsche hose helps restore the correct factory routing and sealing of the air guide / vacuum system.
Common Symptoms of a Faulty Hose
• Cracked, hardened or split rubber hose
• Vacuum leak from the intake / air guide system
• Poor idle quality
• Engine hesitation or rough running
• Hissing noise from the engine bay
• Reduced or inconsistent brake vacuum assist
• Loose or damaged connection at the left “Y” fitting
• Hose collapse or deformation from age and vacuum
• Damage found during intake system or brake vacuum system service.
When to Replace This Part
• If the original hose is cracked, brittle, split or leaking
• During intake manifold, air guide or vacuum system service
• When servicing the suction jet pump / brake venturi circuit
• If vacuum loss is traced to this hose
• When replacing aged rubber hoses on a Porsche 928
• During engine bay restoration
• If the hose no longer seals correctly at the “Y” fitting or brake venturi connection
• When restoring the system with Genuine Porsche parts.
Where It Fits on the Car
This hose fits in the engine bay intake / vacuum system of the Porsche 928. It runs from the left “Y” at the air guide elbow to the brake venturi / suction jet pump air guide connection.
Correct routing is important because this hose is part of the vacuum and air guide system that supports the brake vacuum assist circuit.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92811022400
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
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12 Month Warranty
Worldwide Delivery
OE Match vacuum hose for Porsche 928 S4, GT, and GTS models from 1987 to 1995. This replacement hose fits from the left “Y” at the air guide elbow to the brake venturi / suction jet pump air guide, helping restore correct vacuum routing and intake system operation.
Fits:
Porsche 928 S4 / GT 1987 - 1991
* Engine code: 2841 / 2842 / 2847
Porsche 928 GTS 1992 - 1995
* Engine code: 2849 / 2850
Diagram ref no 10
The vacuum hose routes vacuum between the left “Y” connection at the air guide elbow and the brake venturi / suction jet pump air guide. Correct vacuum hose sealing helps maintain proper vacuum supply, supports brake assist operation, and prevents unmetered air or vacuum leaks that can affect engine running.
Functions
• Replaces the vacuum hose
• Fits from the left “Y” at the air guide elbow
• Connects to the brake venturi / suction jet pump air guide
• Supports correct vacuum routing
• Helps maintain brake vacuum assist system operation
• Helps prevent vacuum leaks and poor running
• Suitable for intake system service, vacuum leak repair, or engine bay restoration
• OE Match replacement for Porsche 928 S4, GT, and GTS vacuum system maintenance.
Why Replace This Part?
Vacuum hoses can harden, crack, split, collapse, or become loose due to age, heat, oil vapour exposure, and engine bay conditions. A damaged vacuum hose may cause vacuum leaks, rough idle, hesitation, poor throttle response, brake assist issues, intake air leaks, or incorrect vacuum system operation. Replacing the hose helps restore correct vacuum sealing and reliable system function.
When to Replace This Part
• Vacuum hose is cracked, brittle, split, collapsed, or leaking
• Rough idle, hesitation, or poor running is present
• Vacuum leak symptoms are detected
• Brake assist feels inconsistent or reduced
• Air guide elbow or suction jet pump area is being serviced
• Engine vacuum system maintenance is being carried out
• Vehicle is undergoing Porsche 928 engine bay restoration or refresh.
Where it fits on the car
This hose fits within the engine intake and vacuum system, running from the left “Y” at the air guide elbow to the brake venturi / suction jet pump air guide on Porsche 928 S4, GT, and GTS models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92811022400
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
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12 Month Warranty
Worldwide Delivery
Air Inlet Hoses, Pipes & Sleeves – Durable Intake Components for Porsche Performance
Air inlet hoses, pipes, and sleeves are essential components of your Porsche’s intake system, connecting the air filter housing, throttle body, turbocharger, and intercooler. They ensure a smooth and sealed flow of air into the engine, supporting efficient combustion, responsive acceleration, and consistent performance.
At Design911, we supply a full range of genuine and high-quality air inlet hoses, pipes, and sleeves for numerous Porsche models that include 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each component is engineered for precision fitment, heat resistance, and airflow stability — helping your Porsche deliver the performance and reliability it’s known for.
What Do Air Inlet Hoses, Pipes & Sleeves Do?
These components channel filtered air through the intake
system to the engine’s combustion chambers. Their main functions include:
- Maintaining
airtight airflow between intake components.
- Reducing
turbulence and air loss for improved throttle response.
- Supporting
optimal air pressure for turbocharged and naturally aspirated engines.
- Protecting against contaminants that can reduce performance or cause engine wear.
In turbocharged Porsche models, these parts also help manage boost pressure, making them crucial to both efficiency and power delivery.
Why Do Air Inlet Hoses, Pipes & Sleeves Fail?
Due to their constant exposure to heat, vibration, and
engine movement, air inlet components can deteriorate over time. Common causes
of failure include:
- Cracking
or splitting from heat cycles and material fatigue.
- Oil
or fuel vapor contamination softening the rubber or plastic.
- Loose
or damaged clamps causing vacuum or boost leaks.
- Age-related
hardening leading to brittle connections.
- Excessive boost pressure stressing the hose in performance applications.
Symptoms of failure include hissing or whistling noises, loss of boost pressure, poor throttle response, rough idling, or a check engine light caused by airflow irregularities.
Why Replace Worn Air Inlet Components?
A leaking or damaged inlet hose can cause unmetered air to enter the engine, resulting in incorrect fuel-air ratios, poor performance, or even turbocharger strain. Replacing worn or cracked hoses and pipes ensures proper airflow, efficient combustion, and reliable performance.
Benefits of replacement include:
- Restored air pressure and engine response.
- Improved turbo efficiency and power delivery.
- Enhanced fuel economy and reduced emissions.
- Long-term reliability with manufacturer-quality materials.
All hoses, pipes, and sleeves available at Design911 are crafted from high-temperature silicone, reinforced rubber, or aluminium alloys for superior sealing, flexibility, and strength — ensuring dependable performance under demanding conditions.
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