Front Bushing

Set the ST A with the larger side of its inner diameter turned upward.
Set the rear arm with the protruding side of bushing turned upward.
Place the ST B on bushing, and push the bushing out.
ST A 20099AE020 INSTALLER & REMOVER SET

ST B 20099AE020 INSTALLER & REMOVER SET

Fig 1: Removing Front Bushing Using ST A 20099AE020 And ST B 20099AE020 Installer & Remover Set
Courtesy of SUBARU OF AMERICA, INC.