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Oil Pipe

WARNING: This page is about a different car, the 2013 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Oil Pipe And Related Components
G08539538Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: N.m (kgf-m, ft-lb) 

T1: 6.4 (0.7, 4.7) 

T2: 16 (1.6, 11.8) 

T3: 20 (2.0, 14.8) 

T4: 29 (3.0, 21.4)