First post here! This place is an awesome wealth of knowledge, been lurking for over a year.
If you're handy with a saw and have a little time you can make what I did here:
Originally the plan was to put a 5 1/2 inch speaker in where the water bottle is but with my 5 1/2's in the dash and the 6 1/2's overhead I really had no need for any more volume! The box is made out of 1/2 plywood. Sprayed the whole thing in Upol Raptor Liner and hand upholstered the cushions. The locks are more of a theft deterrent since they're plastic boat locks I got off of Amazon, but neat none the less. I used to have two 40mm ammo cans bolted where these sit now but it hit your shoulder if you sat in the back. WAYYYY more comfortable now plus it offers MORE storage the old cans!
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If you guys have any questions or want exact dimensions, hit me up!
Here's a side shot of them on the LJ if anyone is curious.
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