hi thanks for looking at my thread im interested in dong the diesel airbox conversion or the 2.2 conversion on the z20let, but hve no idea which 1 is better or easier to fit? A couple of questions is that would i need a diesel astra g box or would the mark 5 airbox be ok? same question aplies to the 2.2 box. Are they both a straight fit? or do they need modified pipework?
Any answers would be most helpful
Thanks in advance

My cars a 2003 astra gsi with just the vectra c intake pipe mod if this helps