Depending what type of induction kit you're running you might be pleased to know the starter motor lives on the front of the engine right under where the airbox fits (or used to). If you've got the DSCI or K&N Gen2 set-up you'll see it easy enough, otherwise it might be easier to try and check it from under the car, especially as you'll need to get under there to drop the radiator cradle if you want to get the standard airbox out.
You could try checking that the heatshield over the exhaust manifold/turbo is tight? There's 3 bolts fixing it to the back of the cylinder head (2 on springs) and 2 into the downpipe it'self. It's a bit blind to check but you can get to it going over the back of the turbo intake pipe which routes round the back of the engine. The engine block can retain a lot of heat so beware of this when you're leaning over it, a thick towel is useful to lean on. If it is loose it's probably easiest to remove the cold air pipe to give better access.