You need to ascertain if it's had a tune.... it would be unlikely, if it has, that a dealer would be able to put it back to stock.
If it's a local car, a tune would have been done at one of the following: All Star Garage (Verso), Maximum Motorsport (ECUTek) or Race Torque (ECUTek)...they would all have records. If it hasn't had a tune and has an aftermarket exhaust, then it needs a tune....
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No Subarus currently owned
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