here is part of one of the emails I got from Rick( had like 11, //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif)
Here is something I highly recommend for your car, my buddy did this to
his LS400 and I have seen it done with numerous other solid cars like
yours with the ID Max.
IB, if my car it is the only way I would use those subs, no matter what
you do or what others say, having your subs coupled into the air space
you are in will just plain sound better and can weigh less, take up less
space in the trunk, etc.
You will still need to deaden the trunk for IB but it will sound so
good, you will not mind the extra work to do this.