Review on Atrend Bbox A151-12CP Single 12" Sealed Carpeted Subwoofer Enclosure - Compatible with 1999-2007 Chevrolet/GMC Silverado/Sierra Extended Cab, in Charcoal Finish by Robert Mulrooney

The only problem was the cheap connector that leaked air. I recommend buying a better one for a snug fit and don't listen every time it hits the leaking air. Plus it's great and the 12" Rockford P3 I put on it fits perfectly, I just had to remove the rubber protector from the magnet and it slid right in. (I'm not a pro so I don't know if it's a bad thing to take it off or if the p3 is too big, although the recommended CUs were close, it works fine for me when connected to a RMS 500W monoblock is from RF)