OH ~ so CT headers do make vibration ^@%#*$#

i got injen intakes and CT headers, straight after CT headers installed vibration was crazy when in gear with air-con on and when HID is on makes vibration as well (minimal).
BUT it makes no vibration when in gears with no air-con on(5AT)

got it checked by T1, 2 problems either engine mount problem or air-con compressor problem.
The thing i really don't get is, if the CT header do make vibration why not make vibration when im in gear with no air-con on but only makes vibration when air-con is on
and why didn't this occur with air-con on but ONLY after CT headers is installed?!?!?!

so now i changed the back engine mount, vibration went away a little bit, going to change front one soon and fingers crossed this vibration will go away and hope its not the air-con compressor problem or else have to put the fujitsubo legalis R CAT on hold.............................................. ................