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Universal Washable Air Filter (Box Stock) fits 2.5 Flange
642 Universal Air Filter (Box Stock)
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Universal Washable Air Filter (Box Stock) fits 2.5 Flange

Part Number: 642
Online Price: $11.95
Universal Reusable Air Filter – Box Stock (Fits 2.5" Flange)
Availability: In Stock.

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Description

Universal Washable Air Filter – Box Stock (Fits 2.5" Flange)


The 642 Universal Reusable Pleated Air Filter is a compact, high-flow performance filter designed to fit most Box Stock kart racing air filter adapters. With a 2.5" flange outer diameter, it is compatible with a wide range of velocity stacks and filter adapters, making it ideal for go-karts, mini bikes, and small engine applications where space is limited.


Constructed with a washable and reusable pleated media, this filter ensures excellent airflow while trapping dust and debris—perfect for both recreational and competitive use. Its low-profile design makes it especially suitable for tight engine fitment or frame-restricted installs.


Filter Dimensions:

  • Overall Height: 5.00"
  • Overall Width: 3.25"
  • Filter Height: 4.00"
  • Flange Height: 0.75"
  • Flange O.D.: 2.75"
  • Flange I.D.: 2.375"
  • Flange/Filter Angle: 0° (straight)


Compatibility:

  • Fits all 2.5" O.D. velocity stacks and air filter adapters
  • Common on Box Stock clone class racing engines and mini bikes


Cleaning Instructions:
Always use an approved air filter cleaner(Maxima Racing Oil Air Filter Cleaner) or mild soap and water. Rinse thoroughly and allow the filter to air-dry completely overnight. Do not use compressed air, hair dryers, or heat sources to speed up the drying process—this may damage the filter media.

FAQ

1. What engines or adapters does this air filter fit?

This air filter fits all 2.5" O.D. velocity stacks and air filter adapters, commonly used in Box Stock kart racing engines, clone class motors, and mini bikes.


2. Is the air filter washable and reusable?

Yes, the pleated media is designed to be cleaned and reused multiple times using an approved air filter cleaner(Maxima Racing Oil Air Filter Cleaner) or soap and water.


3. What are the dimensions of the air filter?

  • Overall Height: 5.00"
  • Filter Height: 4.00"
  • Overall Width: 3.25"
  • Flange Height: 0.75"
  • Flange O.D.: 2.75"
  • Flange I.D.: 2.375"
  • Angle: 0° (straight)


4. How should I clean the air filter properly?

Use only air filter cleaner(Maxima Racing Oil Air Filter Cleaner) or mild soap and water. Rinse thoroughly and let it air dry overnight. Never use compressed air, hairdryers, or heat sources, as this may damage the media.


5. Is this filter suitable for tight spaces or compact engine bays?

Yes. Its short, low-profile design makes it perfect for tight fitments where space around the carburetor is limited.


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