k/n filters


does anybody know the score re fitting k/n filters, what type, where to obtain , benefits/downside, i am in the way of pimping up my 1.3 hijet, boywork organised for early next year looking for ideas relating to engine, cheers bones 851,

not mechanical minded but keen to have a go, continue to be out and about in my silver dream,very strange never seem to see many this side of the country,(up in dundee,) Smile read about a rally re daihatsu next year, woul love to make this if possible but a rather long road to go.......