Bongo Fury

does anyone know if its worth fitting a K&N air filter or should i keep with the one it comes with as standard?

I would say worth it, less maintainance, (ideal if you have a full side conversion) some folk get a better sound from the turbo. Anything that helps to deliver more clean air that the diesel needs can't be bad. It should also work out cheaper over the lifetime of the filter.

Twice as expensive, last three times as long,maybe longer