Leaderboard

Needle nose pliers should work w/o removing anything. That picture only shows the source of one hose, There is one more from the bypass tube from the water pump that sits alongside the crossover, The tubes have a tendency to rust at the bends. http://static.opposedforces.com/epc_img/371494803501.pngSee: Subaru IMPREZA — Subaru parts catalog (opposedforces.com)

Sounds like the coolant hoses coming in and out of the throttle body right? There are two hoses, one goes into the block you might be able to reach with long needle nose pliers. The other goes into the coolant crossover pipe, unfortunately that's directly below and behind the throttle body. You'll have to remove the throttle body and dig close to the center of the block to replace it. Get a spare gasket on hand before you do this, sometimes the old one rips when you disassemble. They're reusable if it comes out in one piece. Don't go crazy on torquing the bolts back on, the soft aluminum threads tend to strip.