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Discussion Starter · #1 ·
Ive noticed alot of forum members here are using the AEM washable filter 28-20304 for their Ascent. The AEM filter 28-20304 is designed for the outback. A lot of people are saying that it is compatible with the Ascent.

Based on my research, I would highly suggest against using it.

I did some research on this topic, I was going to get the AEM filter until I found this INFO.

The air filter size for 2019 Ascent on K and N website is

Height1.563 in (40 mm)
Outside Length9.125 in (232 mm)
Outside Width8.656 in (220 mm)

The air filter size for 2018 Outback on K and N site is

Height0.938 in (24 mm)
Outside Length8.75 in (222 mm)
Outside Width8.563 in (217 mm)

It seems that the AEM filter will be 11mm length and 3mm width shorter and 16 mm thinner. I believe the dirt will seep into the engine due to the smaller size. So I would not recommend the AEM filter that is designed for the Outback.
 

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Super Moderator
2019 Ascent Touring (CWP)
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4,217 Posts
Based on your other identical post deeper in the forum, I'll make the same comment: Robert does his research and that's his personal Ascent in the video. The filter fits.
 

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Premium Member
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77 Posts
It does indeed fit, but it doesn’t have as much overlap as the OEM where the rubber seals around the the opening. It takes a little more care centering it as a result. That is my personal experience. No issues to speak of from my installation.
 
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