Engine Oil Filler Tube Seal O-Ring (22.1X3.5) is a direct fit for the following:

2004-2006 Subaru Baja Turbo
2004-2013 Subaru Forester XT Turbo
2002-2014 Subaru Impreza WRX
2004-2018 Subaru Impreza WRX STI
1987-1994 Subaru Justy
2005-2012 Subaru Legacy GT 2.5L-H4 Turbo

2005-2009 Subaru Outback XT 2.5L-H4 Turbo

Genuine Subaru Part Number: 806922120

Supercedes Part Number: 21191KA000