Has anyone installed a K&N filter in their Audi? I have a 5kCD turbo and I was wondering what part number people used. Also, I know that the air filter is notoriously hard to get to, but what's the best method? I want to pick up the filter, but I don't what to pay someone to install it if I can avoid it. There are a bunch of vacuum hoses from the intake manifold in the way.