Compatible with Subaru Impreza WRX STi Turbo Forester Outback Impreza
The water transfer pipe is the aluminum coolant pipe that crosses over the cylinder block underneath the inlet manifold. It's not uncommon for it to leak onto the top of the engine block. TWO of these O-Rings are required for an easy and inexpensive fix!
They're replacement packs, but they work just as well