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Fuel Filler 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: Fuel Filler Pipe And Related Replacement Components With Torque Specifications
G08538618Courtesy of SUBARU OF AMERICA, INC.

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

T1: 4.4 (0.4, 3.2) 

T2: 7.5 (0.8, 5.5)