hey mate have you had a look under your car at the points where the skirts would mount? from memory there may be holes already there (on gx/lx models) or have impressions along the skirt area indicating where the holes should be tapped. Once you have the holes sorted you can use plastic push lock rivets and double sided tape to secure and mount them. You can also get the OEM clips and skirt seals with double sided tape from Subaru