I know my experience is rare, but when i bought my X it was lowered 1" and i am not sure how it took but it wore completely through the internal bump stops to the point that all large bumps in the road that should be soaked up created a HARSH knocking on either side (metal on metal sound that would send chills down your spine) (and a slap to the face from your girlfriend for not fixing it for 5 months)... When i put it back up to stock it stopped... Just throwing it out there, the struts dont look to be serviceable and they are about $600 a piece for OE...

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06 4.8is Black/Black/Black - Fully Loaded - Comfort Seats - Murdered - Straight Pipe Resonator Delete - HID Projector Fog's - 10W LED AA's - JL Audio 13w6v2 - 500/1