You'll notice a couple of things about this design:
1) They may look pink to the uninitiated. In reality it's cherry blossom red. The color of a warrior. Now you may still think to yourself "It's pink." Go ahead and think that, be sure to remember it when you see a cherry blossom red STi badge quickly getting smaller in front of you.
2) No cutting required to install these. The shape of these is symmetrical. Realizing this TiC came up with an idea - make the bump on one side and a bore on the other. They fit together like the Yin and the Yang.

What they do:
These replace the stock rubber pieces that go between each part of your transmission subframe. Also, unlike the soft rubber ones, these are made of a stiffer urethane.

Why you want them:
Think about it - you want to stiffen up the driveline so there's less play in the system. Have you ever looked at the stock bushings? If not go do so. You'll be amazed at how bubblegum soft they are. You think some play doesn't come from there? Oh, and did we mention they're cherry blossom red?

NOTE:

These will fit 1997-2009 Subarus.  For 1997-2007 Imprezas you will not use the thin spacer.  For 2008+ Imprezas and 2005+ Legacies you will use the thin spacer.