Originally Posted by thehun
I believe it is 4" filter...flange is like .5"
The UNI UP-4275ST filter has the following dimensions
4.5" (115mm) overall OD
2.75" (70.0mm) inlet ID
4" (101.6mm) installed height
0° straight inlet, no angle
After submitting the question about UP6275ST, I finally got an answer from UNI:
6” is the foam length.
Overall approx. 6 ¾” long.
So, 4", 6" is indeed not the overall length. It is only the length of the filter element. Unfortunately, that means the 6" filter will probably be too long for installation on a K&N Typhoon.