


AEM 3.5 inch Short Neck 9 inch Element Filter Replacement
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
AEM 3.5 inch Short Neck 9 inch Element Filter ReplacementAEM AEM 21 2049DK AEM DryFlow Air Filter: 21 2049DK. AEM Dryflow Air Filters are washable synthetic air filters designed for an optimum combination of air flow, filtration, and performance. They use an oil free filtration material that allows easy cleaning and excellent filtration. Air Filter Color: Red Air Filter Large End Diameter: 6 in (152 mm) Air Filter Material: Non woven Synthetic Air Filter Shape: Tapered Conical Base Outside Diameter: 6 in
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
Based on 2155 reviews
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Product Reviews
★★★★★ 5
It fits, just install it exactly like the original filter.
This fits just fine. Please pay attention to install it exactly like the OEM filter is installed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
If you keep your vehicles a few years this will save money
I have been using K&N for 50 years very good quality over OEM filters and it gives your engine better breathing. Saves money over the long run.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
Can’t go wrong with KN
Been using for years in all my vehicles. One time pricey but then years of trouble free performance enhancing filtration for your engine. Five minutes to install on 24’ Honda Pilot.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 5
Good value
It’s a K&N quality filter, enough said
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Reviewed in the United States on April 22, 2026
★★★★★ 5
It fits
Fit my car perfectly. Hopefully it lasts longer than normal filters.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026