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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
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Description
Dinan High Flow Drop-In Replacement Air Filter - 2016-2021 BMW 230I/M240I/330I/340I/430I/440IDinan High Flow Drop in Replacement Filters are a direct upgrade to your factory intake system and will instantly provide better flow to assist your engine in achieving maximum performance and efficiency! While factory paper filters function admirably, they can be restrictive to performance goals given the material used. They also require being replaced numerous times during the lifespan of the vehicle, which can add up to a substantial amount in
Dinan High Flow Drop-in Replacement Filters are a direct upgrade to your factory intake system and will instantly provide better flow to assist your engine in achieving maximum performance and efficiency!
While factory paper filters function admirably, they can be restrictive to performance goals given the material used. They also require being replaced numerous times during the lifespan of the vehicle, which can add up to a substantial amount in maintenance costs. Limited performance and increased maintenance costs are never ideal but can be resolved effectively and economically in the case of filters. Dinan High Flow Drop-in Replacement Filters are constructed of 4 layers of cotton gauze that allow better flow and less pressure drop than the stock media. This equates to the engine not needing to work as hard to make the same, or more power. Additionally, the use of oiled cotton media means that the Dinan filters are washable/re-usable while still retaining excellent filtration and ensuring your engine runs clean for the duration.
When upgrading to a complete Dinan intake system for best performance, is not available, possible, or within the budget, Dinan High Flow Drop-in Replacement Filters have you covered!
General D401-0041 Filter Dimensions: 265mm x 260mm (10.43" x 10.24") Compatible OEM Part #Cross Reference: 13718632502
Features:
- Less restrictive and better flowing than stock allowing maximum engine performance and efficiency
- Direct replacement for stock air filter
- 4 layers of proprietary high flow oiled cotton gauze material for exceptional filtration
- Washable and reusable for the life of the engine
- Quick and easy installation
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 4
Very fluffy and comfortable.
It only stays cool for a few minutes. It is a very comfortable pillow.
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Reviewed in the United States on December 13, 2025
★★★★★ 5
Double Sided Cooling Pillow
Color: Blue, Size: King(2 Pack)-20'*36'
I truly love these pillows. They are sent with extra filling so if their not firm enough you can add more and if their to firm you can remove some. You can make these pillows to your liking. They fluff right back up. Their comfortable and you really get your moneys worth. I love them.
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Fantastic pillows
Color: Blue, Size: Standard(1 Pack)-20'*26'
Fantastic pillows----never get headaches like others
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Recommend this product
Color: Blue, Size: Queen(2 Pack)-20'*30'
I bought these for my boyfriend who is a hot sleeper. They are super thick & comfortable. The pillow stays cool & has a great texture. They didn’t have a bad smell. Bought these 3 years ago & they are still like brand new, durable
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Reviewed in the United States on May 11, 2026
★★★★★ 3
Good, but not life-changing
Color: Blue, Size: Queen(2 Pack)-20'*30'
These pillows are decent but not amazing. I like that they’re adjustable and come with extra fill, so you can make them softer or firmer depending on how you sleep. The cooling side feels nice at first, but it doesn’t stay super cool all night. They’re comfortable enough, but not a huge upgrade from regular pillows. Good, just not life-changing.
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Reviewed in the United States on February 26, 2026
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