Description
This air filter fits the Honda Acty Truck HA3, HA4 (1991). It screens dust and grit out of the intake so the carburetor and engine breathe clean air.
In Stock - ships from our California (USA) warehouse
Fast, reliable delivery - no overseas backorder wait.
Vehicle Fitment & Compatibility
Confirm your chassis code against the table below before ordering.
100% Fitment Guarantee
Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full.
Signs you need this air filter
- A visibly dirty or clogged element
- Rough idle, hesitation, or a drop in fuel economy
- Dust build-up in the airbox
- Overdue on your maintenance schedule
Features & Function
- Correct airbox size for the Acty intake
- Protects the carburetor and cylinders from abrasive dust
- Restores clean airflow for a steady idle
Installation Specifications
- Difficulty: Easy.
- Estimated time: about 10 to 15 minutes.
- Required tools: No tools, or a screwdriver for the airbox clips.
Oiwa Garage Tech Note
"This filter fits the 1991 660cc Acty. Inspect the intake snorkel and box gaskets while it is open; a cracked box undoes the filter's job by drawing unfiltered air."
Frequently Asked Questions
Will a dirty filter hurt the carburetor?
Yes. A clogged filter richens the mixture and lets grit reach the carb and bores, so keep it fresh.
How do I check if my air filter is dirty?
Pull the element and hold it up to the light. If it is dark, packed with dust, or you cannot see light through it, replace it. A clogged filter richens the mixture and dulls throttle response.
Can I clean and reuse a paper element?
No - blowing out or oiling a paper filter tears it or lets grit through. Replace it rather than clean it.
Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.