I am going to try something different. I am going to mount a Uni Filter UP4275ST 2.75" ID x 4" in length filter into my 12 Focus while still utilizing the OEM air box.
Reason I went with the shorter dimension filter is that it will allow the filter to get literally a 360* of air...and now that air will also be drawn from the huge 6" opening in the front of the air box.
The filter length of 4" is used to mount the filter deep inside the box to prevent water from being sucked in.
I ran this same filter in my 06 WRX that supported over 400WHP so I am sure this will be plenty of filter for our Focus. It is also a dual stage filter so filtering out dirt is a breeze[gunfire][gunfire][gunfire][gunfire]
I've been looking at the UP6275ST filter to use with my K&N intake. It is this same filter, only 2" longer. Please post your impressions when you get it!
Just took some picks of the new Filter. I know a drop i would have been easier but with all the people cutting holes and modding this and that. This can solve both.
I am going to try something different. I am going to mount a Uni Filter UP4275ST 2.75" ID x 4" in length filter into my 12 Focus while still utilizing the OEM air box.
Do you happen to know if the "length" spec that UNI states includes the clamp flange, or is it just the length of the filter element? I emailed UNI about this early last week and got no response. The reason I ask is that the 6" filter will be a tight fit with the K&N Typhoon if the spec doesn't include the flange.
I'm probably not going to do that. UNI doesn't quite match the flow rate of an equal-sized K&N, and my K&N is larger than the 4" UNI. Granted, the UNI filters better, and that's exactly why I was considering it.
I think for now I'm just going to buy and Outerwears prefilter for my K&N. I will consider adding the 6" UNI later. I can modify the current setup to give me just enough room for it.
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