This is GNP's rear shifter stay for most Subarus. It's designed to be a direct replacement for the soft rubber bit that your Subaru came with.  It is made from a very stiff 90a shore strength polyurethane that's designed to allow more precise shifting by holding the shifter assemble a lot more stable.
Available in red or blue to match our 5 and 6 speed front shifter bushings
 
Available for:
1993-2011 Subaru Impreza
2002-2014 Subaru WRX
2004-2015 Subaru WRX STi
2004-2008 Subaru Forester XT
2013-2015 Subaru BRZ
2013-2015 Scion FR-S
2005-2009 Subaru Legacy