Got a feeling that AWX denotes the engine code.
I think Bluefox has a Skoda Fabia VRS so it's pretty much the same engine as the 130 ASZ found in the Golf (as far as I'm aware!)
Incidentally I've got a 130 and just use the standard filter; seems fine with that; both rolling roads I've been on show her to be putting out 144 and 140 (obviously take the results with a pinch of salt!)
Yeah, AWX is the engine code - but I've actually got a Skoda Superb 130 TDI, my mum's got a Fabia VRS.
Incicentially, my engine's mounted north-south and mum's is east-west, so I'll assume the Fabia's engine is very similar to the Golf's. Did the ASZ have a six-speed box?
Ryhso, thought you'd had yours remapped recently?