[Tielur]

Does anyone know where I can get replacement parts for my mudguard ( I think that's what it's called ).

I've found this link but it just seems to be smaller parts, not the actual mudguard
MUDGUARD. FRONT '11MY-.. Fits: 2012 Subaru STI S SEDAN 2.5L TURBO 6MT 4WD | Subaru Parts Online

 

[nsibanez]

Looks like you tore off both, that part of the splash shield, plus part of the wheel well liner. You'll need both, plus the miscellaneous screws/tabs it looks like. Those chunks of plastic are going to cost a couple hundred bucks as well

 

[Tielur]

Is this something I should take to the dealer to get fixed? I originally thought I could just order a part and snap it in. I'm a total noob when it comes to this stuff.

 

[McBill]

Is this something I should take to the dealer to get fixed? I originally thought I could just order a part and snap it in. I'm a total noob when it comes to this stuff.

That Mud guard is what you need. The link you posted has everything you will need. That being the Front Right Mud Guard (59110B), a few of the clips (45687) and potentially The bumper clip (W140007). I would look around to see if you can't see any more clips that are missing before you order.

This is fairly simple to replace if you put the front right on jack stands and remove the wheel.