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AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
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AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System

Marsoni M251S
Sale price$125.00
Pay 4 payments of $31.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake SystemAEM cold air intake systems are designed to increase horsepower and torque. The system includes an oversized AEM DRYFLOW synthetic washable air filter, engineered to provide outstanding airflow, filtration, and performance, and also features a mandrel bent aluminum intake tube and high quality hardware. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom
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  • Express: 1-2 business days

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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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 134 reviews
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Product Reviews
I
Verified Purchase
Izzy
Los Angeles, US
★★★★★ 5
Great quality and performance
Size: 1" x 1" x 1"
The quality of the filter is great and it is easy to installed in your car. Also, it helps to improve the performance of your vehicle, keep clean air flowing and avoid bad smells. What I love about it it’s the option to washed it and reuse it over an over.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 24, 2025
J
Verified Purchase
Joshua L.
Los Angeles, US
★★★★★ 5
Awesome product!
Size: 1" x 1" x 1"
Awesome product! Fit just as it should. A lot better then buying the replacement ones every time I do an oil change. I drive a mile of gravel roads everyday and this helps keep the dust from coming into the vehicle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 3, 2026
R
Verified Purchase
Robert
Lexington, US
★★★★★ 5
Fit my Subaru Forester perfectly!
This fit my 2024 Subaru Forester perfectly. The filters exhibited a high quality construction and was packaged well. Installation was easy and saved me a lot of $ vs. having my dealer install an OEM filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 16, 2025
J
Verified Purchase
Jeremiah
Waukegan, US
★★★★★ 5
Good Fit
I don’t expect this filter to last as long as the original filter but that’s okay because it is about half the cost. It looks well made. I didn’t see any flaws. I chose this filter because it had some of the fewest complaints regarding the fit and it worked well for my ‘23 Subaru Forester. I may go back to an OEM filter next time but it’s nice to know that this one will work for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
J
Verified Purchase
John Appleseed
Birmingham, US
★★★★★ 5
Fits as advertised
Good item
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026

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