This modification replaces a squishy rubber bushing on the end of the shifter sty rod. The stay rod connects the back of the gear box to the body and is the foundation on which the shift lever sits. Replacing this bushing is supposed to reduce flex in the shifter linkage thus improving shifter feel resulting in less missed shifts. I tend to miss more shifts than I feel is fair based on my own opinion of my ability so it seemed like a good mod. Cost was about $30 from RalliSpec. They make their own from delrin which is a very hard plastic.
I had to put the front of the car on jack stands in order to slide under. This is one of the down sides of lowering an Outback. The stay rod sits in the transmission tunnel above the propeller shaft and exhaust and is kind of tight and hard to get at. The stay rod bushing is easy to unbolt but is a one piece affair so I decided I would have to remove the entire stay rod from the car in order to push the rubber bushing through its hole. It actually comes out quite easily and may be possibly removed with the stay rod in place but I only discovered this after I removed the assembly. There is also a small spring and retaining plate to remove here. Anyhow, if you decide to remove the stay rod to facilitate the bushing replacement you will need to remove the circlip that holds the bottom of the shift lever to the stay rod. You will need a special pair of pliers for this. You can get it off with a screw driver but there is no way I think it would go back without circlip pliers of some kind.
Next you need to unbolt the say rod rear bracket from the car. The bolts are accessible with a 10mm socket but I found I need a 10" bar before I had enough room to turn the socket wrench. They we not very tight and easy to remove. Once free the bar needs a bit of jiggling to get it out. The rubber bush just pushes through and the new bush comes in two haves so it is easy to install.
Putting it back together is very easy but I need need a pair of needle nose pliers to get the spring to cooperate.