on a similar note, has anyone tried the Koni inserts for the Corolla? These are the ones that require cutting the original strut and inserting the Koni cartridge. Again, Koni makes them for the Corolla but not the Matrix/Vibe. But you can probably cut an OEM Matrix/Vibe strut open and install the Koni insert, if the OEM Matrix/Vibe struts are the same diameter as the OEM Corolla struts.
If they would fit, then you wouldn't have to do anything to a Matrix or Vibe that you wouldn't have to do to a Corolla.
If you install the Bilsteins on a Vibe, you need to widen the two bottom holes since they use bigger bolts than the Corolla uses.
So, will either one fit?