Subaru 2009 IMPREZA Service Manual page 967

FUEL INJECTION (FUEL SYSTEMS)
7) Remove the bolts which hold fuel injector pipe
onto intake manifold.
8) Remove the fuel injector.
Fuel Injector
B: INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
NOTE:
Use new O-rings.
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
FU-03034
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
FU-04299
2. LH SIDE
FU-03091
Install in the reverse order of removal.
NOTE:
Use new O-rings.
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
FU(H4DOTC)-42
FU-03089
FU-03087
FU-04299