space is tight...in my 96 (obs, xtra cab) i raised the seat 2inches
and STILL was NOT able fit an 8inch tube under the seat !
the trend now is to turn the speakers on their face or back....but
many subs are now 6 inches PLUS in mounting depth.
measure the depth and then add up the thickness of the wood and
then whats left over will be the MAXIMUM speaker size that will
fit under the rear seat.
investegate some of the new SHALLOW (aka FLAT) mount subs from
Pioneer,
JL Audio and others.
depending on the type of front seat set up you have...you might consider
something like -->
JL Audio: Products OR
JL Audio: Products OR
JL Audio: Products
the problem w/ the JL front <center> seat boxes is they render the
front seat nearly un-usable <aka hard as a rock>...theyre expensive boxes
and they use the OLDEST speakers that JL Offers <imo theyre over priced>
and you can probably get some shop to build you a better box for less $