The Last Air Filter Your Acty Will Ever Need
Built specifically for the Honda Acty (HA3, HA4, HH3, HH4), GhostFlow drops into your stock airbox in five minutes with no tools. One filter, the whole life of the truck.
💨 Lower Restriction vs OEM
🔄 Reusable For Life
🇺🇸 Made in the USA
🔧 Drops Into Stock Airbox
The airflow claim here is backed by independent ISO 5011 lab data, published below.
Independent ISO 5011 testing, SGS-IBR, May 2026. Full results below.
The Filter That Pays For Itself
A Genuine Honda OEM filter costs $64.13 and gets thrown out every year, over $640 in the trash across your Acty's life. GhostFlow is the opposite. Clean it, reuse it, and it pays for itself in under two years.
Genuine Honda OEM
~$640
ten filters, ten years, all in the landfill
GhostFlow
$119.99
one filter. that's it.
You save over $500, and skip a decade of landfill.
♻️ Buy it once. Clean it. Drive it forever.
Why Acty Owners Are Upgrading
The Honda Acty was engineered in 1990 for Japanese delivery routes. The factory filter was chosen to balance filtration, durability, and parts cost. Like any dense paper element, it trades airflow for low-cost filtration. For three decades that paper filter has been the bottleneck no one in the Acty aftermarket bothered to address.
GhostFlow replaces it with a high-flow pleated cotton-gauze element sized to the actual HA3, HA4, HH3, and HH4 airbox geometry. Lower airflow restriction than the factory paper element, verified by independent ISO 5011 lab testing. Reusable, and built specifically for the platform.
Confirmed Fitment
GhostFlow fits every third-generation Honda Acty Truck and Van chassis built for the Japanese domestic market between 1990 and 1999, all powered by the E07A 656cc three-cylinder engine. One filter, the entire third-generation production run.
- Honda Acty Truck HA3 (1990-1999, E07A engine, 2WD)
- Honda Acty Truck HA4 (1990-1999, E07A engine, 4WD)
- Honda Acty Van HH3 (1990-1999, E07A engine, 2WD)
- Honda Acty Van HH4 (1990-1999, E07A engine, 4WD)
🎯 Direct replacement for Honda OEM part number: 17220-PZ3-505.
What's in the Box
- One GhostFlow Performance Air Filter (pre-oiled, ready to install)
- GhostFlow threaded adapter stud and multi-layer sealing washer
- Cleaning and re-oiling instructions
- Oiwa Garage sticker
Installation
No mechanic needed.
First time working on your Acty? You've got this. No tools, no cutting, no tuning. Five minutes, start to finish.
📺
Watch the Install Video: Watch exactly how it drops into the airbox.
- Unclip the airbox.
- Lift out the old paper filter.
- Thread the GhostFlow adapter stud onto the factory center post until snug.
- Drop the GhostFlow filter onto the stud.
- Add the sealing washer and hand-tighten the wingnut until airtight.
- Close the lid, snap the clips, and drive.
What Acty Owners Are Saying
★★★★★
"Literally took 3 minutes to install. Fit perfect in my 1994 and 1999 Acty's. Quality is great and I love that I can clean and reuse it. 10/10 would recommend."
Zach Z. ✓ Verified Buyer
★★★★★
"The quality is unmatched! Won't use anything other than this. Worth the investment because you can reuse it. With prices getting higher to ship parts overseas, this is a great US-made alternative to the stock paper filter."
Hayden H. ✓ Verified Buyer
★★★★★
"Installed this on our 1999 Honda Acty that we built into a micro cafe on wheels. The install was super straightforward and the fitment was perfect. Great quality piece."
Michael S. ✓ Verified Buyer
Independent ISO 5011 Airflow Results
A less restrictive air filter lets the engine draw air more easily. During independent ISO 5011 laboratory testing at SGS-IBR, GhostFlow measured lower airflow restriction (net differential pressure drop) than the factory paper filter at every airflow point we tested.
| SCFM |
GhostFlow |
OEM Honda |
Delta |
| 10 |
0.01 |
0.01 |
Tied |
| 20 |
0.02 |
0.03 |
-33% |
| 30 |
0.04 |
0.05 |
-20% |
| 40 |
0.07 |
0.09 |
-22% |
| 50 |
0.11 |
0.12 |
-8% |
💡 What is SCFM? SCFM (Standard Cubic Feet per Minute) is the volume of air moving through the filter. Here is what each tested point represents and the measured difference in restriction:
-
20 SCFM (light cruising): GhostFlow measured about 33% lower restriction than the OEM paper filter.
-
30 SCFM (gentle acceleration): About 20% lower.
-
40 SCFM (harder acceleration or inclines): About 22% lower.
-
50 SCFM (near peak airflow demand): About 8% lower, where the two filters move closest together.
Straight talk: lower restriction is one input into how freely an engine breathes. On a small carbureted engine like the E07A, the real-world difference is modest, which is why we point to the lab data and the fact that the filter is reusable, rather than big horsepower claims. The honest reason to run GhostFlow is that it flows measurably better than a worn paper element, it is built for your truck, and you only buy it once.
Specifications
| Vehicle fitment |
Honda Acty HA3, HA4, HH3, HH4 (1990-1999) |
| Engine |
Honda E07A 656cc 3-cylinder |
| OEM replacement for |
17220-PZ3-505 |
| Filter media |
High-flow pleated cotton-gauze |
| End cap material |
EPDM rubber |
| Installation type |
Drop-in airbox replacement |
| Install time |
Approximately 5 minutes |
| Tools required |
None |
| Manufactured in |
USA |
| Final inspection |
Long Beach, CA |
| Verified by |
ISO 5011 (SGS-IBR), May 2026 |
| Service interval |
Inspect annually, clean as needed |
Frequently Asked Questions
Will GhostFlow fit my Honda Acty?
If your Acty is a 1990 to 1999 Honda Acty with a chassis code starting in HA3, HA4, HH3, or HH4, yes. GhostFlow is a direct OEM replacement for part number 17220-PZ3-505.
Will I need to re-jet or re-tune my carburetor?
No. The variable-venturi PGM-CARB on the E07A self-adjusts within the airflow range GhostFlow operates in, so there is no re-jetting or tuning required. Drop the filter in, close the airbox, drive.
Is GhostFlow pre-oiled?
Yes. GhostFlow ships pre-oiled and ready to install straight from the box. No prep, no spraying, no waiting. When it comes time to clean the filter, you will need to re-oil the media with a standard cotton-gauze filter oil before re-installing.
How long does GhostFlow last?
Service interval depends on your driving conditions. Inspect at every oil change, clean and re-oil at minimum once a year. The filter media is built to last the life of the vehicle.
Does GhostFlow fit the Acty Van the same as the truck?
Yes. The Honda Acty Van HH3 and HH4 share the identical E07A engine, intake manifold, and airbox assembly as the HA3 and HA4 truck. The filter fits and performs identically across all four chassis.
Cotton-gauze filters filter worse than paper. Is this really safe for my engine?
Honest answer: cotton-gauze media historically tests 1 to 3 efficiency points below paper across the aftermarket category. That is the trade-off cotton-gauze makes in exchange for higher airflow.
How does this compare to K&N or other cotton-gauze brands?
K&N and most major cotton-gauze brands do not produce a filter sized to the Honda Acty airbox. Owners who have tried adapting universal filters have run into fitment issues, sealing problems, or required airbox modifications. GhostFlow is the first cotton-gauze element built specifically for the HA3, HA4, HH3, and HH4 airbox geometry. Drop-in fit, no compromises.
Where do you ship?
Domestic US shipping ships from Long Beach within 2 business days. International shipping available at checkout.
FOUNDER PRODUCTION RUN ACTIVE
Limited to 200 units in the first production run at founder pricing of $119.99. Price increases to $139.99 once the founder allocation sells out. The next production batch is not yet scheduled.
Designed in Long Beach • Made in the USA • Built for the Honda Acty
