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Airbox / Housings

DISPLAYING 1 to 2 (of 2 products)
Special Order item
99950744201
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Product Information

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Related, superseded, cross reference or alternative numbers for comparison.

99950744201
99950744202
99950744201

The product you are viewing cross references to these numbers
Special Order item
PAF008434
Product Information
Product Information
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



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Related, superseded, cross reference or alternative numbers for comparison.

PAF008434
99902525501
99902525502
PAF008434

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Airbox / Housings

Airboxes & Air Filter Housings – Clean Airflow for Peak Porsche Performance

Airboxes (also known as air filter housings) play a vital role in your Porsche’s intake system by securely housing the air filter and directing clean air into the engine. Designed to optimise airflow while protecting the engine from dust, debris, and contaminants, airboxes ensure maximum performance, fuel efficiency, and reliability under all driving conditions.

At Design911, we offer a comprehensive range of genuine and high-quality airboxes and air filter housings for various Porsche models including the transaxle cars,  911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each housing is precision-engineered for a perfect fit, maintaining proper airflow and filtration for superior engine health and performance.

What Do Airboxes & Air Filter Housings Do?

The airbox is a critical component in your Porsche’s air intake system, performing several important functions:

  • Houses and seals the air filter to ensure only clean, filtered air enters the engine.
  • Optimises airflow for improved throttle response and engine performance.
  • Reduces intake noise while balancing air pressure.
  • Protects the air filter from water, heat, and debris exposure.

Properly functioning air filter housings maintain engine efficiency, reduce wear, and ensure smooth, consistent performance — particularly in high-performance Porsche applications.

Why Do Airboxes & Air Filter Housings Fail?

Over time, airboxes and housings can deteriorate due to exposure to heat, vibration, and environmental conditions. Common causes of failure include:

  • Cracked or warped housings due to heat cycling or impact damage.
  • Broken clips or seals leading to unfiltered air leaks.
  • Moisture or debris intrusion causing filter contamination.
  • Distortion from improper fitment or previous repairs.
  • Aging materials such as brittle plastic or rubber gaskets.

Symptoms of a failing airbox include reduced engine performance, check engine lights, poor throttle response, or visible damage or looseness around the air filter housing.

Why Replace a Damaged Airbox or Housing?

A compromised airbox can allow unfiltered air and debris to enter the engine, leading to premature wear or poor combustion efficiency. Replacing damaged or aged components restores proper sealing, improves airflow, and protects your Porsche’s engine from contamination.

Benefits of replacement include:

  • Restored air filtration and clean airflow.
  • Improved throttle response and power delivery.
  • Prevention of engine damage from dust or debris.
  • Long-term reliability with manufacturer-quality precision.

Our airboxes and housings are constructed from high-strength materials for exceptional durability, precise sealing, and optimal airflow dynamics — engineered to maintain your Porsche’s performance and refinement.

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