Here's a build log for a custom stealthbox i did for a customer at my old shop. Car was a 2011 Volkswagen GTi. We decided on using a Digital Designs SW6.5 for the sub. This little guy does wonders.! Unfortunately, i wasn't able to hear this setup since i quit before we got to install it. I did 90% of the enclosure, so i dont take full responsibility for it. The other installer simply smoothed down the box with bondo/resin milkshake and wrapped the box in oem carpet. I personally made the mold, speaker rings, and full enclosure. i will only post pics of what i did and also the finished product.