If you have an older Subaru chances are that some of those soft rubber original bushings could use a little help. GNP's 6-speed shifter bushing and transmission mount bushings are a very affordable way of helping a sloppy manual shifter and smooth it out, They install with simple hand tools.
1 GNP Front Shifter Bushings 6 speed (blue)
1 GNP Rear Shifter Stay
1 GNP Set Transmission Bushings
5sp or 6sp