What I really meant to ask was if anyone had seen or heard one in person, thanks for the reply anyway. JL makes a box very similar called the stealthbox for 4th gen. and 3rd gen. but I haven't seen any prices for them you can check them out @ JL.com...The only thing I didn't like about JL's box is that you have to drill a hole through the wheel well for a bolt for the '01. I don't know if you have to do this also with the q-custom box, so if anyone knows please let me know. As far as the basslink, I haven't heard much about the sound quality and low end bass response, but I have seen them on ebay new for $175-$200 plus S/H. Q-logic for as low as $150 plus S/H, and I have yet to price a JL stealthbox. Please let me know if you decide to get the JL box for your 4th gen. Thanks