Why run two amps instead of one? Seriously, two power and ground wires, and that B55 Bomber will fit under the steering column.
@isaac2098 recently installed one and could provide feedback.
This is the 4 channel Soundstream I currently have installed, but I also have an 8 channel. This Soundstream is powering two 10" subwoofers and easily does the job. You could grab this plus a mono amp, but I would just say that it is so much easier of an install with one amplifier and power/ground.
https://www.amazon.com/dp/B017VCX0TW/?tag=wranglerorg-20