Hi people. Need new air flow meters for R33 gtr motor as mine have started playing up so figure I'll upgrade to z32's while I'm at it as I already have aftermarket turbos, Power fc etc. I've noticed a lot of them on ebay that are not Bosch or jecs ones but some still come with a Good 2 year warrenty but a lot cheaper to buy. Anyone used or uses them? If so, have you had ANy issues? are they just as good reliability and performance wise? And are they just as tuneable as the Bosch ones etc?