

🛠️ Protect your power, rain or shine — the pre-filter your engine deserves!
The FILTERWEARS Pre-filter F237L is a USA-made, hydrophobic, breathable mesh cover designed exclusively for HKS Mushroom Style Air Filters. Engineered to repel water, deflect dirt, and endure heat up to 450°F, it ensures extended air filter life and consistent performance. Its precise 8-inch diameter fit and strong elastic hold make it a reliable upgrade for millennial car enthusiasts who demand both style and substance under the hood.
| ASIN | B07JYDFQLK |
| Best Sellers Rank | #242,632 in Automotive ( See Top 100 in Automotive ) #3,093 in Automotive Replacement Air Filters |
| Brand | FILTERWEARS |
| Customer Reviews | 4.1 4.1 out of 5 stars (84) |
| Date First Available | October 27, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2 ounces |
| Item model number | F237L |
| Manufacturer | FILTERWEARS |
| Manufacturer Part Number | F237L |
| OEM Part Number | F237L |
| Package Dimensions | 7 x 5 x 0.75 inches |
N**D
Seems like a quality bit.
I’m using this on a 97 Aristo V300 2JZGTE after installing a HKS Racing Suction intake on the stock twin turbo intake piping. The filter size is a 200/100. The fit is nice and tight. There appears to be a very strong elastic that will hold it in place. It didn’t seem to change the sound of the intake at all and after a few days of having it on the filter I noticed a good amount of fine dust in it too so it actually appears to be a good pre filter. The logo is nice and doesn’t look cheap. The over feel of the material seems very durable. I was only going to use this during wet weather but I may just leave it on all the time. My biggest concern when I purchased it was how it fit and honestly I can say it’s very snug. Accurate measurements were taken and it fits like it should. This seems like a good product from my initial instal and it’s not cheap looking in the engine bay. My initial assessment is that it is a good purchase. I’ll update if I have any issues.
J**1
Exactly as described
Fits perfectly on the HKS mushroom air filter. Great quality and works great.
B**S
Elastic fits very loose on a hks 150-80
Filter media feels nice but fitment is "eh" at best.. not bad enough to not use but not good enough for me to recommend or buy a second one
A**R
good quality
works as intended
A**Y
To big doesn't work or stay on filter
Stay away if you want to waste your money its great if you need a shower cap for your hair lol. Way to big for the filter they say it's for.
C**O
Fits as described
Fits perfect on my HKS mushroom filter
Y**A
Looks good on my 1j
N**Y
Needs a way to sinch down
Fits but not tight, use it on my mini bike and will probably fly off some day if I don't modify it.
V**T
Its very small it barely fits on my 200mm hks replica filter but it seems to be hanging on.
Trustpilot
2 weeks ago
3 days ago