I have an Audio Integrations 12 inch subwoofer enclosure for sale. It was used in my 2005 STI for about 4 months (car was totaled). Previous owner I bought it off of had it for about a year. The thing is mint and sounds awesome. I had an Infinity Kappa Perfect 12in subwoofer being pushed by about 250w RMS and it delivered the perfect amount of bass.
Included is the mounting bolt and hardware I used to mount it (very easy to do), as well as the flush mount trim ring in black vinyl. The sealed enclosure is stuffed with poly-fill stuffing to increase the sound performance.
Should fit all 2005-2007 Impreza sedans only, including Impreza 2.5i, 2.5 RS, WRX, and STI.
Looking for $200 OBO...I'd prefer local meetup since it's a bit on the heavy side, but I can ship at Buyer's expense if you'd like.
Right now it's without the subwoofer, but I can can include it if you include that in your offer (sub retails BNIB over $100...$80+ on ebay...used for only 4 months).
Here is AI's website with further information: 05-07 Subaru WRX/STI Sedan 12 Inch Perfect Fit Enclosure
Pictures of actual enclosure:
The only mounting hardware needed...