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EC Walbro WB-37 Filter Adapter
326FA EC Billet Filter Adapter
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EC Walbro WB-37 Filter Adapter

Part Number: 326FA
Online Price: $29.99
326FA Billet Filter Adapter for Walbro WB-37 Carburetors
Availability: In Stock.

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Description

326FA Billet Air Filter Adapter for Walbro WB-37 Carburetors


Upgrade your setup with the EC 326FA Billet Filter Adapter, engineered to mount a 2.5” ID air filter to your Walbro WB-37 carburetor. Ideal for kart racing classes where high-flow velocity stacks are restricted, this adapter offers a legal, high-quality alternative without compromising fit or function.


CNC-machined from 6061-T6 billet aluminum, the adapter ensures durability, precision, and a secure fit, even under demanding racing conditions. Each unit includes the required hardware for easy installation.


Note: We recommend using velocity stacks wherever rules allow, as they provide superior airflow and performance. Always consult your rule book before purchasing.


Features & Benefits:

  • Designed for Walbro WB-37 carburetors
  • Mounts standard 2.5” ID air filters
  • Ideal for classes where velocity stacks are not allowed
  • CNC-machined from 6061-T6 billet aluminum
  • Includes all installation hardware
  • Durable, lightweight, and corrosion-resistant


Fitment & Specifications:

  • Carb Fit: Walbro WB-37 (and WB-3A variants)
  • Adapter OD: Approx. 2.5"
  • Bolt Spacing: ~45.75mm (1.80")
  • Bolt Hole Size: 5mm
  • Filter Fit: Accepts 2.5” ID round air filters
  • Material: 6061-T6 Aluminum
  • Finish: Machined or anodized (if applicable)


Compatibility Notice:

Please double-check your filter’s inner diameter and carburetor bolt pattern before ordering. This adapter is designed to fit WB-37 series carburetors commonly used in kart racing.

FAQ

Q1: What carburetor is this filter adapter designed for?

A: The 326FA is specifically designed to fit Walbro WB-37 and WB-3A carburetors, commonly used in kart racing applications.


Q2: What size air filter will this adapter accept?

A: This adapter is made to fit 2.5-inch inside diameter (ID) air filters. Please confirm your filter size before ordering.


Q3: Can I use this instead of a velocity stack?

A: Yes—this adapter is ideal for classes where velocity stacks are not allowed. If your class allows stacks, we recommend using them for better performance.


Q4: What material is the adapter made from?

A: It’s CNC-machined from 6061-T6 billet aluminum, offering excellent strength, precision, and corrosion resistance.


Q5: Is installation hardware included?

A: Yes, all necessary mounting hardware is included in the kit for quick and secure installation.


Q6: Is this adapter legal for all kart racing classes?

A: It depends on your racing organization. The adapter is designed to meet spec class rules where velocity stacks are not permitted. Always check your local or series-specific rulebook before purchasing.

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