I binned my K&N from my 2006 3ltr - they are not made specifically for the D22 and fit a number of models. Mine was a bitch to fit and when I removed it for the 4th clean it was all bent out of shape.
Paper ones are easier to tap clean in dusty conditions, as the oil on the K&N makes that near impossible.
Be careful not to over oil because that is messy!
Performance - slightly better, with a definite increase in snorkel noise.
My opinion only.
.