WARNING: This page is about a different car, the 2006 Subaru Outback and 2006 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Install in the reverse order of removal.
Tightening torque:
Bolt (A): 6.0 N.m (0.6 kgf-m, 4.4 ft-lb)
Nut (B): 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)
Fig 1: Identifying Air Cleaner Case Bolt
NOTE:
Fasten with a clip after inserting the lower tab of case.