Sorry...the PZEV is my car...a ZX3....my wife has a ZETEC ZX5....I think the problem may be the strut bar...the carbon fiber intake keeps hitting the strut bar, causing the piece to come loose and come off. H&N is working on a FIPK for the PZEV....they had my car for two weeks and have worked out the bugs for the manual...they have an automatic focus up the now and are dyno-ing it....the kit should be released in the next few weeks.
To solve the problem I reinstalled the stock intake tube, but left the K&N cone filter and metal box in place. Worked like a charm. No more rubbing or bumping of the intake tube. Car runs better now. I am going to email Max at K&N and let him know about this design defect. Hopefully they will improve the kit so it will work with the STB.