i like the milltek exhaust, the difference is that the resonated system has an extra silencer and non-resonated doesn't. awesome gti say that the non gives the diesel engine a more petrol sound, just don't want it sounding like a machine gun!! if anybody has or knows someone who has a system fitted, could you let me know which one sounds better. think the panel filter is spot on mate. have read that i should stay away from oily filters and go for a cotton one. True??