Today while i was replacing my dipstick guide which i broke whilst doing my thermostat, i thought i would quickly check the air filter as i havnt owned the car long. Anyway it was filthy. I did think my car was a bit sluggish for a 1.8t, so i took it for a nip down the road with the airbox unclipped, and wow what a difference, cant believe how much more responsive my car was, and i could even here the turbo. Anyway now i want a new air filter, but not sure whether to get a panel filter for standard box or get a cone filter. Also if i got a cone filter what would i do with the sensor thats screwed to the side of the airbox? Found this a bit strange as i used to own a 2001 s3 which didnt have this sensor on the airbox?