couldn't wait so installed the K&N filter yesterday, found some extra tubing to go with the one that came with it for more cold air and after washing the car decided to take it for a run, what a noise!
sounds a bit deeper when ticking over and you can hear it sucking air in but put it under load with your foot down and the noise hehe! went for a quick burn down the A130 and back (not far from me) and cruising it sounds ok, not to loud but drop down to 4th and boot it and WOW it roars...
i'm well happy with it and can't wait for the RR day now as it'll make most people go deaf i reckon hehe
and i don't care what steveH says about the car, it's great and he's seriously missing out with his narrow minded-ness
which makes me wonder, anyone got a custom exhaust and a K&N or similar air filter on there 620Ti? would love to know what that would sound like :)