

🚗 Breathe new life into your Ram—filter smarter, drive stronger!
The KAX Premium Engine Air Filter (CA9401) is a high-performance replacement designed specifically for Ram 1500, 2500, and 3500 models from 2002 to 2023. Featuring 99.9% filtration efficiency and a special embossed paper media, it traps fine particles like dust, pollen, and water droplets to protect your engine from premature wear. With a 200% longer lifespan than standard filters—up to 20,000 miles—this filter ensures peak engine performance with easy, tool-free installation that fits perfectly into your factory airbox.

































| ASIN | B09KPDWMG7 |
| Best Sellers Rank | #900 in Automotive ( See Top 100 in Automotive ) #7 in Automotive Replacement Air Filters |
| Brand Name | KAX |
| Customer Reviews | 4.8 4.8 out of 5 stars (3,530) |
| Fit Type | Vehicle Specific Fit |
| Global Trade Identification Number | 06976893115821 |
| Included Components | 1* CA9401 Engine Air Filter,1x Product Manual |
| Item Dimensions L x W x H | 13.8"L x 9.4"W x 2"H |
| Item Type Name | CA9401 Premium Engine Air Filter |
| Manufacturer | KAX |
| Manufacturer Part Number | 5300GAF0411US_11 |
| Manufacturer Warranty Description | 1 YEAR |
| Model Number | CA9401 |
| OEM Equivalent Part Number | CA9401, AF3590, A2943C, A3590, 2725, PA5462, A35462, 5303240AA, 530322404AA, 42725, PXA42725, AF5225 |
| Product Grade | Replacement Part |
| Shape | Rectangular |
| Unit Count | 1.0 Count |
A**X
Perfect Fit for 2021 Honda Odyssey Elite
This engine air filter was a perfect fit for our 2021 Honda Odyssey Elite. Installation was quick and easy, popped right into place with no issues at all. The build quality looks great, and it feels just as solid as the factory filter it replaced. It’s always nice to find a reliable replacement part that fits exactly as it should. We drive a lot of gravel as well and this has held up well to those elements. Great value compared to dealership pricing. Will definitely purchase again when it’s time for the next replacement.
T**R
Easy Install, But Check the Fine Print
I needed a replacement engine air filter for my 2021 Mazda CX5, so I picked up this KAX GAF037, which the listing clearly shows is compatible with my L4 2.5L model. Installation was a breeze; it fit perfectly into the airbox and the whole process took me less than ten minutes, which is always a plus for simple DIY car maintenance. I appreciate knowing that it uses a three layer design, which should do a better job filtering out the dust and pollen here in the country, and the peace of mind about potentially extending my engine's life is great. My only minor issue is that the listing is very specific about only fitting "Naturally Aspirated" engines, and while mine is, that's a key detail that could easily be missed by a casual buyer, so people need to double check their specific engine type before purchasing. Overall, it's a solid, well-fitting filter that I’m happy to use for my routine maintenance.
H**R
Works as expected
Fit my 2021 Tundra 5.7 airbox perfectly. The quality of the filter seems pretty good, and my truck performs normally.
G**G
It's a Filter @ A Good Price.
It's a filter. Seems well crafted and at a good price. Fit up to my 2019 Cx-5 2.5L naturally aspirated just fine. Power difference is minimal as expected, however it does seem to cause the ECU to relearn a tad due to slightly different MAF readings, indicating it may actually flow more than a standard drop in filter. Update: after 200 miles of driving mpg has gone up 1 point and may improve a bit more.
A**R
Quality and fast delivery
My husband bought this air filter to use. It came quickly and it fits just fine. Seems to be a good quality for the price and quick delivery.
P**R
Good product
Fit perfect for a 2025 Chevy equinox. Great value and easy installation.
M**R
Good filter
It fit and seems ok 2016 RAM 1500 5.7
A**R
Good quality
Good quality filter . Perfect fit
H**A
منتاز مميز جوده عالية
B**T
Well made perfect fit
S**Y
Fit my 2007 GMC Sierra 1500 Classic perfectly. I did a quick before/after install test of 20-100kmph and there was a 0.63 second improvement with this filter. To be fair, the old basic white paper filter was medium dirty. But still impressed. Truck seems to have a bit more pep.
T**M
Taille parfaite pour mazda 3 2010 gt change le son pour un son beaucoup plus agressif, beaucoup plus dair qui passe dans lentree dair
T**H
KAX Premium Engine Air Filter fits well with my car and is of good quality. Highly recommend!
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