Airbox / Housings

Air intake hose adaptor.

Fits:
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GTS 2016
Porsche 982 (718) Boxster GTS 4.0L 2017>>
Porsche 982SP Boxster Spyder 2019>>
Porsche 982C (718C) Cayman 2GTS 4.0L 017>>
Porsche 982C Cayman GT4 2019>>

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Diagram ref no 5

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98111013

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Air Intake Resonator (Muffler). 

The Genuine Porsche Air Intake Resonator (Muffler) 99611022200 is an original equipment replacement component designed for the air intake system of early Porsche Boxster 986 models manufactured between 1997 and 1999.

Fits:

• Porsche Boxster 986 2.5L 1997-99

Diagram Ref No 9

Also referred to as an air intake muffler or intake noise damper, this component helps control the sound produced by air moving through the engine's intake system while maintaining the original Porsche intake arrangement.

The first-generation Porsche Boxster features a mid-mounted, naturally aspirated flat-six engine that relies on a carefully designed air intake system to supply filtered air to the engine.

During operation, the engine draws air through the intake housing and associated ducting towards the throttle body. The rapid opening and closing of the engine's intake valves, together with variations in airflow demand, create pressure fluctuations and sound waves within the intake system.

The air intake resonator is designed to influence these pressure fluctuations and help reduce certain frequencies of intake noise.

This allows Porsche to maintain a balance between the distinctive sound of its flat-six engine and the refinement expected during everyday driving.

Unlike an exhaust muffler, which reduces sound in the exhaust system, the intake resonator works on the engine's air intake side.

The original Porsche resonator forms part of the intake arrangement specified for early Boxster 986 vehicles.

Over time, ageing plastic components, repeated heat cycles, vibration or previous engine maintenance may cause the original resonator to crack, loosen or become damaged.

A damaged resonator can alter the normal intake sound and, if it creates an opening into the intake tract, may contribute to an unwanted air leak.

Loose or deteriorated mounting connections may also cause vibration or rattling during engine operation.

Replacing a damaged resonator with Genuine Porsche part number 99611022200 helps restore the original intake assembly, intended acoustic characteristics and secure component fitment.

This replacement is particularly suitable for Porsche owners carrying out engine intake maintenance, restoration or repairs to a cracked or missing original resonator.

Because this component is manufactured to the original Porsche specification, it is intended to retain the correct configuration of the early Boxster intake system.

What This Product Does:
The Porsche Air Intake Resonator is designed to help control intake sound and maintain the intended configuration of the engine's air induction system.

Its principal functions include:

• Reduces Intake Noise: Helps attenuate selected frequencies created by airflow and intake pressure fluctuations.
• Controls Intake Resonance: Influences acoustic pressure waves within the intake arrangement.
• Maintains Factory Intake Characteristics: Helps preserve the sound and refinement intended by Porsche.
• Supports Original Air Intake Configuration: Forms part of the specified early Boxster intake assembly.
• Helps Maintain Intake System Integrity: Provides the intended connection and enclosure when correctly installed.
• Reduces Unwanted Induction Sound: Helps prevent excessive intake roar caused by a damaged or missing resonator.
• Supports Secure Component Fitment: Replaces cracked or physically damaged intake parts.
• Maintains Original Porsche Specification: Allows the factory intake arrangement to be restored without an aftermarket conversion.

Symptoms Of Wear Or Failure:
Although the air intake resonator does not normally require replacement at fixed service intervals, its condition may deteriorate as the vehicle ages.

Common symptoms include:

• Visible cracks in the resonator body.
• Splits around connection points.
• Broken or damaged housing sections.
• Unusual intake noise.
• An air leak if the damage opens into the intake system.
• Louder induction noise.
• Unexpected intake roar during acceleration.
• Whistling or whooshing sounds.
• A change in the engine's normal intake tone.
• Additional noise at particular engine speeds.
• Movement around the resonator connection.
• Rattling during engine operation.
• Loose clips or clamps.
• Misalignment with adjoining intake components.
• Intermittent vibration-related noise.

Why Replacement Matters:
Replacing a defective intake resonator helps restore the condition and original characteristics of the Porsche Boxster air intake system.

Although it is primarily an acoustic component, its physical integrity and correct installation also matter.

• Restores Original Intake Sound: Helps maintain the factory balance between induction sound and refinement.
• Replaces Cracked Components: Removes damaged or deteriorated resonator housings.
• Helps Prevent Intake Air Leaks: Restores the intended enclosure when the old component has a relevant crack or failed connection.
• Reduces Unwanted Resonance: Helps address abnormal intake-related sounds.
• Eliminates Loose Component Rattles: Restores secure fitment where the original resonator is damaged.
• Maintains Factory Air Intake Design: Preserves the original Porsche configuration.
• Supports Reliable Engine Operation: Helps maintain proper intake system integrity.
• Suitable for Restoration: Provides the correct component for an original-specification Porsche Boxster.
• Genuine Porsche Replacement: Uses the original manufacturer part number.
• Avoids Unnecessary Modifications: Restores the intake arrangement without changing to an aftermarket induction system.

Related reference numbers
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99611022200

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Airbox Filter Housing without Air Filter insert.

Fits:
Porsche Boxster 986 (except Special model 50 years Spyder)

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Diagram ref no 1

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99611012110

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Bonded rubber mounting - 20x15/M6
Sold each

Fits:
Porsche 911 - 1984 to 1986
Porsche 964 - 1989 to 1994
Porsche 944 S - 1987 to 1988
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005

Diagram ref no 3

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99970326500

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Speed Nut 4,8
This original Porsche fastening nut is used to secure the air cleaner housing cover, helping keep the intake air box assembly correctly fastened and sealed.
Sold individually, 2 required per vehicle

Fits

• Porsche 987 Boxster / Boxster S 2005 – 20008
• Porsche 987C.1 Cayman 2.7L / 3.4L 2006 – 2008
  
  

Diagram ref no 4

This is a small factory fastening component used on the air cleaner / air intake housing assembly.

What This Part Does / Functions
•  Secures the air cleaner housing cover
•  Provides a fixing point for the air box cover screw
•  Helps keep the air cleaner cover correctly seated
•  Supports proper air cleaner housing assembly fitment
•  Replaces a missing, corroded, worn or damaged original speed nut
•  Helps prevent loose air box cover panels
•  Provides correct Genuine Porsche fitment and fastening specification
•  Supports proper reassembly after air filter or intake system service.

Why Replace This Part?
Speed nuts can become worn, corroded, bent or lost during air filter replacement and intake system servicing. If the speed nut is missing or damaged, the air cleaner housing cover may not secure correctly, which can cause poor fitment, rattling or incorrect sealing of the air box cover.

Replacing it with a Genuine Porsche speed nut helps restore the correct factory fastening arrangement.

When to Replace This Part
•  During air filter replacement if the speed nut is missing or damaged
•  When removing or refitting the air cleaner housing cover
•  If the cover screw no longer holds securely
•  During air box or intake housing repair
•  If the original clip nut is corroded, loose or distorted
•  When replacing worn air cleaner housing hardware
•  During engine bay restoration.

Where It Fits on the Car
This speed nut fits on the air cleaner housing cover / air box cover assembly. It provides the retained threaded fixing point for the cover hardware.

Correct installation helps ensure the housing cover sits securely and the air cleaner assembly remains properly fastened.

Related reference numbers
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99950744201

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Washer for rubber mount.  - Multiple applications

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster - 2005 to 2012
Porsche 987 Cayman - 2006 to 2012
Porsche 996 - 1997 to 2004
Porsche 997 - 2005 to 2012
Porsche 991 - 2012 5o 2019



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PAF008434

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Water Drain Tube.

The Porsche Water Drain Tube 99611029700 is a genuine Porsche replacement drain pipe used within the air-cleaner and water-trap assembly on selected Porsche 986 Boxster models.

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster 986 2.7L 2003-04  

Diagram Ref No 18

Located in the engine air-intake system, the tube provides a controlled route for water collected by the air-cleaner water trap to drain away rather than remaining around the intake assembly.

Its role is particularly important in helping keep accumulated rainwater and moisture away from the air-filter element and intake tract.

Manufactured as a genuine Porsche component, it provides the correct dimensions and fit for the original air-cleaner installation.

What This Product Does:
The air-cleaner system must provide the engine with clean intake air while helping prevent unwanted water and debris from reaching the filter and intake tract.

The water trap separates collected moisture from the incoming air path, while the drain tube allows this water to escape.

The water drain tube helps:

• Drain collected water from the air-cleaner water trap
• Prevent standing water around the air-filter assembly
• Reduce the risk of the air-filter element becoming unnecessarily wet
• Direct moisture away from the intake system
• Maintain the intended operation of the Porsche air-cleaner assembly
• Keep the original water-management system complete
• Replace a split, blocked, hardened or missing original drain pipe

Symptoms Of Wear Or Failure:
The drain tube can deteriorate through age, heat exposure, contamination and repeated temperature cycling.

Possible symptoms include:

• Visible cracks or splits in the tube
• Hardened or brittle material
• Tube becoming loose or detached
• Distorted or collapsed tubing
• Blockage from dirt or debris
• Water remaining in the air-cleaner water trap
• Moisture or standing water around the airbox
• Damp air-filter element
• Water staining around the air-cleaner assembly
• Incorrect drainage into the surrounding engine compartment
• Missing drain tube during inspection

Because this component is primarily a drainage part, deterioration may not immediately produce an engine warning light or obvious drivability problem.

Why Replacement Matters:
Although relatively small, the drain tube forms part of Porsche's original intake water-management system.

A damaged or obstructed tube can prevent collected water from draining correctly.

Continued use with a failed drain tube may contribute to:

• Persistent moisture around the air cleaner
• Premature air-filter deterioration
• Unwanted water accumulation
• Corrosion or staining of surrounding components
• Reduced effectiveness of the air-cleaner water trap
• Increased risk of moisture progressing further into the intake system

Replacing a deteriorated tube restores the intended drainage route and helps protect the air-cleaner assembly from unnecessary moisture accumulation.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99611029700

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