AEM 21-204DK 3.5" Inlet x 5" Element Dryflow Air Filter

Filter made a huge difference to engine bay rides smoother rpm stays steady no rough idle more horsepower exhaust sounds cleaner and louder better than oil filter just rinse with water and it’s ready fir more use highly recommended thanks Amazon for this fast shipping item

I have an 07 cobalt SS, with quite a few mods that I autocross and lightly drag race in addition to daily driving. I was previously using a spector filter for the sake of price point, but after seeing how my last one was starting to come apart I knew it was time for a change.During cruise control lock at 75mph on flat ground, my maf rate (scanned by aeroforce) went from an average 1.5-2.2lb/m to 3.7-4.2lb/m a mind blowing increase, the supercharger whines a lot louder, and the filter seems to be of a very durable construction. It's holding up well after a few months, no signs of needing a change. Also purchased the dry flow wrap with it because of the location of my intake piping. (bottom of front fender)

The AEM Dryflow filters are my choice of reusable filters. Many filters that require oil can easily be over-oiled leading to MAF sensor failure. Also, cleaning and oiling the oil-based filters is a complete pain. With the Dryflow, you can rinse the filter clean and reinstall as soon as it's dry. If the filter is real dirty you can clean it a little more aggressively.Also, the Dryflow filters do not use a metal mesh for the structure. This is very important for the longevity of the filter because it is common to drop the filter or have other objects in the engine bay contact the filter from time to time. With the Dryflow filter the shape will remain unchanged. This is especially good for some of the applications we use this filter on where the filter touches the hood when installed.

Fits perfect! Works great. Nothing wrong with it

Knocked a star because mine arrived slightly beat up, but the box was in perfect shape which leads me to believe it was accidentally mishandled at the manufacturer. Great filter though; much more confidence inspiring than the K&N that it replaced, which I could see pinholes of light through.

I took off my original K&N filter, compared the inlet with this new one(while still in plastic)....And sure enough, the new one is way too large to fit my pipe! It's going back for the 2.5" Inlet, less the shipping fee :(

This filter has been a great replacement for the K&N oiled filter that I had on my Porsche 911 (996) as part of the upgraded K&N cold air intake system. The oil seemed to not play nicely with the mass air flow sensor even when I only lightly oiled the filter, but I've had zero problems after switching to this filter.

It filters air. It does so very well. It is washable, and obviates the need for purchasing disposable filters. It's not cheap, but you only have to buy it once. It's pretty sharp-looking, but who's going to see it? It works well, and I would buy it again.

I purchased this filter to replace the K&N oiled style filter for the aftermarket Roc Euro cold air intake because I wanted a filter that could be cleaned/re-used that didn't have to be oiled. The AEM website was great as it provided instructions on how to measure the existing air filter so I could pick one from the AEM catalogue that would fit.I have been using this filter for about three years now and it has held up great. I definitely recommend it if you're looking for more airflow over the stock filter with the added benefits of being able to clean the filter without having to buy messy oil and not having to oil means there is zero chance of damaging air sensors by over oiling the filter.As a side note, I did notice that the filter is not as loud as the K&N oiled style filter that came with the Roc Euro indicating that it probably doesn't flow as well, but I think the trade-off is that it likely provides better filtering than the K&N.

I noticed a moderate improvement in my fuel economy using this filter instead of the filter I had before

Fit right onto the AEM V2 SRI (2002 Civic Si Hatchback)

I replaced both air filter in my car with these, it should keep the cost of replacement down as they can be clean

The perfect replacement for my AEM V2 short ram intake for my RSX Type S. I cleaned my previous filter numerous times, but eventually, the filter was getting worn out and needed to be replaced.