Hoses / Pipes / Sleeves

Air Guide For Air Cleaner.
Fits:
Porsche 986 Boxster 1997>>2004
Cars With Option Codes:
091 - Special Model '50 Years Spyder'
Diagram Ref No 8

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98711022001

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Air injection hose - air pump to shut off valve.
Fits:
Stricter emission-control concept (option code: 661)
Porsche 986 Boxster 2.7L / 3.2L 2000-02
Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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99611316400

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Air injection hose - air pump to shut off valve.
Fits:
Stricter emission-control concept (option code: 661)
Porsche 986 Boxster 2.7L / 3.2L 2000-02
Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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99611323905

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Air injection hose - air pump to shut off valve.
Fits:
Obd 2 (option code: 660)
Stricter emission-control concept (option code: 661)
Porsche 986 Boxster 2.7L / 3.2L 2000-02
Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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99611323906

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Air Injection Hose. 

The Genuine Porsche Air Injection Hose (Part Number 9A111333900) is an original equipment replacement component designed to maintain efficient airflow within the secondary air injection system on selected Porsche Boxster and Cayman models.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12  

Diagram Ref No 10

Manufactured to Porsche's original specifications, this air injection hose provides a secure connection within the secondary air injection circuit, allowing fresh air supplied by the secondary air pump to reach the relevant engine emissions control components.

The secondary air injection system plays an important role in reducing harmful exhaust emissions during engine cold starts. By introducing additional oxygen into the exhaust stream, the system helps promote the oxidation of unburned hydrocarbons and carbon monoxide while supporting faster catalytic converter warm-up.

The air injection hose must maintain an effective connection to ensure the system can deliver the required airflow during operation. Exposure to engine heat, vibration, moisture and repeated temperature changes can gradually weaken the original hose and its fittings.

Over time, the hose may become brittle, cracked, split or detached, allowing pressurised air to escape and reducing the effectiveness of the secondary air injection system. A damaged hose may contribute to increased cold-start emissions, unusual air pump noises or engine management warning lights.

Replacing a worn or damaged air injection hose with a Genuine Porsche component helps restore correct airflow, maintain the integrity of the emissions control system and support reliable engine operation.

Ideal for secondary air injection system repairs, emissions-related fault diagnosis, preventative maintenance and Porsche engine servicing.

What This Product Does:
The air injection hose is a connecting component within the engine's secondary air injection system, which operates primarily during specific cold-start conditions.

Its main functions include:

• Transfers Secondary Air: Carries fresh air from the secondary air injection pump towards the associated air distribution components.
• Supports Cold-Start Emissions Control: Helps supply oxygen to the exhaust system during the engine's warm-up phase.
• Reduces Harmful Exhaust Emissions: Supports the oxidation of unburned hydrocarbons and carbon monoxide during cold starts.
• Assists Catalytic Converter Warm-Up: Helps create conditions that promote faster catalytic converter light-off and effective emissions treatment.
• Maintains Correct Airflow: Provides a sealed passage for the air supplied by the secondary air pump.
• Prevents Air Leakage: Helps prevent the loss of secondary air pressure through damaged connections or deteriorated hose material.
• Accommodates Engine Movement: Allows for normal vibration and small movements between connected engine components.
• Supports Engine Management Operation: Helps the secondary air injection system deliver airflow when commanded by the engine control unit.
• Maintains Factory Emissions Configuration: Replaces the original air injection hose using Porsche's specified component design.

Symptoms Of Wear Or Failure:
The air injection hose operates in a demanding engine compartment environment where heat, vibration and repeated temperature changes can contribute to material deterioration.

Common symptoms of a worn, damaged or leaking air injection hose include:

• Engine Management Warning Light: A secondary air injection system fault may trigger the check engine light.
• Secondary Air Injection Fault Codes: Diagnostic trouble codes relating to insufficient secondary air flow, such as P0410, P0411 or manufacturer-specific equivalents, may be recorded.
• Cracked or Split Hose: Visible cracks, splits or damaged sections of the hose may allow air to escape.
• Brittle or Hardened Material: Ageing and prolonged heat exposure can cause the hose to lose flexibility.
• Loose or Detached Connections: Damaged retaining clips or hose ends may prevent the hose from remaining securely attached.
• Unusual Cold-Start Noises: A leaking or detached hose may produce a hissing or rushing-air sound while the secondary air pump operates.
• Reduced Secondary Airflow: Leaks or restrictions can prevent the correct volume of fresh air from reaching the emissions control system.
• Emissions Test Failure: A malfunctioning secondary air injection system may contribute to emissions-related inspection problems.
• Damaged Hose Fittings: Cracked connectors or worn retaining features may allow air leakage at the connection points.
• Heat or Abrasion Damage: Contact with surrounding engine components may cause chafing, deformation or localised wear.
• Visible Hose Displacement: The hose may no longer follow its original routing or may have become disconnected during previous repairs.

Why Replacement Matters:
Replacing a worn or damaged secondary air injection hose is important for maintaining the correct operation of the vehicle's emissions control system.

Key Benefits of Replacement:

• Restores Secondary Airflow: Helps maintain the intended flow of fresh air through the secondary air injection circuit.
• Reduces Air Leakage: Replaces cracked or damaged hoses that allow pressurised air to escape.
• Supports Cold-Start Emissions Control: Helps the secondary air injection system operate effectively during engine warm-up.
• Protects Emissions System Performance: Supports the intended operation of the catalytic converter warm-up process.
• May Resolve Airflow-Related Faults: Can correct secondary air injection fault conditions where a leaking or damaged hose is confirmed as the cause.
• Maintains Secure Connections: Restores proper hose fitment and retention within the air injection system.
• Reduces Unwanted Airflow Noise: Helps eliminate hissing or rushing-air noises caused by hose leaks.
• Genuine Porsche Quality: Manufactured to the original equipment specifications for the applicable application.
• Correct Factory Fitment: Designed to match the intended hose routing and connection arrangement.
• Supports Long-Term Reliability: Helps prevent recurring problems associated with deteriorated hose material.
• Ideal for Preventative Maintenance: Suitable for replacement when the hose is found to be cracked, damaged or excessively brittle during servicing.
• Supports Emissions Compliance: Helps maintain the factory emissions system in the condition required for correct operation.

Although the secondary air injection hose is a relatively small component, it performs an important role within the vehicle's emissions control system.

A damaged or disconnected hose can interrupt the delivery of secondary air, potentially resulting in increased cold-start emissions and engine management faults.

Replacing the hose with a Genuine Porsche component helps restore the designed airflow path and reduces the risk of continued air leakage.

Related reference numbers
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9A111333900

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Air intake manifold rubber sleeve.
Fits:
Porsche 987 Boxster / Boxster S 2007-08 M97.20/21/22 engines
2.7L 2007-08 (not for 2005-06)
3.4L 2007-08
Porsche 987 Cayman / Cayman S 2006-08
engines M97.20/21
Porsche 997 C2 / C2S / C4 / C4S 2005-08
engines M96.05 / M97.01
Click 'Zoom in' for large parts diagram.
Diagram ref no 10.
Price is for each.

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99711068500

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Air intake hose from air mass sensor to engine.
Fits:
Porsche Boxster 987 MKII 2009-12
Porsche Cayman 987C MKII 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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98711027030

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Air intake hose, for air cleaner.
Fits:
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08
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Diagram ref no 16

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98711022201

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Air Intake Tube For vehicles with Tiptronic transmission
Fits:
Porsche 986 Boxster 2001-04 Tiptronic Transmission
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Diagram ref no 8

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99611002705

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Connecting line, 1-3 cyl.
Fits:
Porsche 987.2 Boxster 2.9L 2009-12
Porsche 987C.2 Cayman 2.9L 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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9A111301702

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Connecting line, Cyl. 4-6.
Fits:
Porsche 987.2 Boxster 2.9L 2009-12
Porsche 987C.2 Cayman 2.9L 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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9A111301802

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Engine Air Intake Hose.
The Genuine Porsche Engine Air Intake Hose 99611022107 is a replacement air intake duct for compatible Porsche vehicles. It forms part of the engine's induction system, providing a sealed route for intake air between the relevant air-filter/intake components and the engine.
Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999
• Porsche Boxster S 986 3.2L 1999

Cars With Option Codes:
073 - Version For Russia
249 - Tiptronic Transmission
481 - 5th Speed Manual Transmission  
Diagram Ref No 8

A correctly sealed intake hose is important for consistent airflow, engine performance and reliable engine-management operation. Over time, the original hose can harden, split, crack or develop leaks due to engine heat, vibration, age and repeated thermal cycling.

Replacing a damaged or leaking hose helps restore a properly sealed intake tract and prevents unwanted air or contamination from entering the induction system.
What This Product Does:
The engine air intake hose carries intake air through the engine's induction system.

Its primary functions include:

• Providing a controlled path for intake air
• Maintaining a sealed connection between intake components
• Helping prevent unwanted air leaks
• Supporting consistent engine airflow
• Protecting the intake system from dirt and contamination
• Supporting correct engine-management operation
• Helping maintain smooth engine performance

The hose must remain securely connected and free from cracks or splits to perform correctly.
Symptoms Of Wear Or Failure:
Common signs of a damaged or deteriorated engine air intake hose can include:

• Visible cracks or splits
• Hardened or brittle material
• Loose connections
• Damaged hose ends
• Collapsed or distorted sections
• Hissing or sucking noises
• Rough or unstable idle
• Hesitation during acceleration
• Reduced engine performance
• Poor throttle response
• Engine-management warning light
• Air/fuel mixture fault codes
• Increased fuel consumption
• Dirt or contamination around damaged areas

The exact symptoms depend on the location and severity of the leak.
Why Replacement Matters:
Replacing a cracked, split or deteriorated engine air intake hose helps restore the integrity of the induction system.

A sound replacement hose can help:

• Restore a properly sealed intake path
• Prevent unwanted air leaks
• Maintain consistent airflow
• Improve idle and drivability where a leak was present
• Support correct engine-management operation
• Prevent dirt and contamination entering through damaged areas
• Reduce intake-related fault codes
• Maintain reliable engine performance

Ignoring a damaged hose can allow a relatively straightforward intake leak to develop into persistent drivability and diagnostic problems.

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99611022107

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Hose clamp, 12-22 mm - Various Applications.
Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008


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99951255400

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Intake manifold to air distributor rubber sleeve, designed to ensure proper sealing and airflow in the intake system. It replaces part numbers 996.110.685.51 and 996.110.685.52. This rubber sleeve provides excellent durability, vibration resistance, and leak-free performance, ensuring smooth engine operation.
Sold each.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 986 Boxster 1997 - 2004
Diagram ref no 11
•  Acts as a flexible connector / sleeve within the intake manifold, helping bridge or seal parts of the intake path.
•  Helps ensure proper air flow sealing between sections of the intake manifold or throttle body / related components.
•  Reduces risk of air leaks, which can affect engine performance, idle stability, emissions, or cause unwanted engine behaviour.
•  The rubber material accommodates vibration, thermal expansion & contraction, and slight movement in the intake assembly.

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99611068553

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Intake manifold to air distributor rubber sleeve.
This intake manifold sleeve is a high-quality replacement, designed for the Porsche Boxster 986. This rubber sleeve ensures a proper seal between intake components, maintaining smooth airflow and reliable engine performance.
Sold each.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 986 Boxster 1997 - 2004
Diagram ref no 11
•  Manufactured from durable, heat-resistant materials, this sleeve offers excellent vibration absorption and long service life.
•  Direct-fit replacement for OE part numbers 996.110.685.51 / .52 / .53
•  Maintains airtight sealing and correct airflow
•  Cost-effective alternative with dependable performance

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99611068553

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Resonance Tube Intake Sleeve.
Fits:
Porsche 987 Boxster / Boxster S 2007-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 Carrera 2 / 4 / 4S 1998-04
Porsche 997 Carrera 2 / 2S / 4 / 4S 2005-08
Porsche 996 GT3 2000-05
Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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99611012053

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