K&NSynthetic Air Filter Cleaner and Degreaser: 32 Oz Spray Bottle; Restore Engine Air Filter Performance, 99-0624

Works great I’m cleaning the filters on my brother

This size provides enough cleaner to ensure a good cleaning of the air filter. Smaller volumes barely get the job done.

starts working instantly

Worked great for cleaning my cold air intake filter

I don't know when the last owner cleaned the air filter on the 2013 Harley Fatboy I just boigjt but with 2 cleanings it looked brand new

I have a blox shorty that I used this on. Worked like a charm.

I have used K&N for a number of years in my truck. I like their products and this is no exception. Cleaned the air filter quickly, rinsed, and set out to dry and re oil. Just be careful not to let it sit too long. The cleaner shouldn't be allowed to dry on the filter before rinsing.

I have an AEM synthetic air filter cone on my Mazda's short ram. While AEM used to market their own cleaning kit, they now suggest using this K&N cleaner. I can see why. The old AEM kit cost more, used a lot more chemicals, and soaked the filter to such an extent that it took forever to dry. With the spray bottle you can use less cleaner, but can apply it better and get the same results. Cleaned it at night and put the filter back on in the morning.Fortunately (or unfortunately) it cleaned the filter so well that the engine computer interpreted it's new easy breathing as a fault and threw the check engine light on. You can fix that on most cars by disconnecting your battery for less than a minute. You'll have to reset your radio settings though.