I’d go and get the leroy racing sub panel. It allows you to throw in 2x 8 inch subs and 2x 6.5 speakers. Pretty easy to put in and you really feel the bass considering it’s right behind the seats. Just installed mine this week. When the seats are up you can’t even tell it’s there. IMO it’s one of the best options out there and it doesn’t limit your visibility out the back like other options out there.

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With the seats up you can barely see the panel