WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.
Install in the reverse order of removal.
Tightening torque:
Clamp (A), (B) 3.0 N.m (0.3 kgf-m, 2.2 ft-lb)
Bolt (C) 6.4 N.m (0.65 kgf-m, 4.7 ft-lb)
Fig 1: Identifying Clamp And Bolt Securing Air Intake Chamber