both the UNI and the K&N are washable and oiled filters. The UNI is a foam filter with a spring to keep shape. the K&N is cotten and screen. The UNI is saidto have better filtration protection, but the K&N flow more air. I've had both, both are great. The UNI are half the cost of the K&N, though. I sold the UNI and kept the K&N for looks.
