step away....
subarus dont use EGR valves.....what you are refering to is the PCV valve....pretty essential.
the charcoal canister is at the rear of the car, on the pass side, right at the bumper...although i dont see why you want to remove it.
weighs about two pounds, you can make up for that by taking a healthy dump...
not to mention you will have numerous CEL's due to removing it.
