Air Filter flip


Active Member
Was over on RVnet forum reading about pros and cons of K&N air filters. About the time I bought the 94 Burb (June 2016), Camping World was offering a K&N air filter for the '94's for $10. So I ordered one and threw it on. Most of the comments on the RV forum were negative against K&N. I'd read that before in other places so decided to put a new stock filter on. Note that I had cleaned the K&N once.

The results were amazing, immediately more power, particularly towing. And, for the first time over 10 mpg towing, was 9-9.5, never over 10.

As for proof of more power, there is one short, but fairly steep hill on I-5 going thru Bellingham that always slows me down to 50 mph in third when towing. This time it went up at over 55 mph, almost 60, that's a big difference (trailer weight the same as other times).

I have a K&N air filter for sale cheap if anyone is interested.
K&N is documented to allow 100X's more particulate through but people still swear by them. Hard to believe how good their advertising is.


Active Member
Well their advertising really good cause it keeps sucking me in and I once thought I was smart and knew something. Back in the '90's we were towing with a 454 '88 Suburban which needed help cause of the small valves and low compression, so I used K&N for a while. Now that I think about it (harder and harder to do these days), I finally went back to the stock filter and got better results. I think what happened is that I got tired of cleaning the filter and just bought an AC. They've just gotten it into the gearhead psyche that K&N means better performance.
I remember (late 80's or early 90's) when they used to have countertop demo machines with a ping-pong ball showing the extra flow compared to a paper filter. Didn't show the extra dirt going through.

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