There is no stock subwoofer for the Sport trim level. There is a spot marked on the center of the rear deck where the subwoofer would go on the higher trim levels but I am not going to cut out the sheet metal.
I was thinking of building a mounting plate to mount the 823's with one each firing through the factory 6.5" holes. I have way too much power for these 2 subs IB but I figure I can use the 360.3 to drop the level way down.