Except For STI Model

Remove the transmission assembly from the vehicle. < Ref. to REMOVAL , Manual Transmission Assembly. >
Remove the dust cover.

Fig 1: Identifying Release Lever And Dust Cover
Courtesy of SUBARU OF AMERICA, INC.
Remove the attachment point of lever spring by inserting a screwdriver through the clutch housing release lever hole. Then remove the release lever together with the release bearing.

Fig 2: Removing Attachment Point Of Lever Spring
Courtesy of SUBARU OF AMERICA, INC.