My turbo build is about to get finished up here in the next few days and now have the problem of what air filter to run. I have a Holset H1C on a custom fabricated manifold that does not give me a lot of room for my air flter. My K&N filter is way too big to fit. I was at my local powersports shop yeterday and noticed that they have a foam UNI filter with a 3in inlet that looks like it will do the trick as it is foam and can be pushed down a little bit. It is for "off road/dust" conditions. I think it is for a Rhino. Question is, how well do these things flow once you oil them. I am sure it will filter just fine as it is for dust, but flow restriction is my bigger concern. Has anyone used one of these before? Good or bad results ?