Finally got this installed in my Sierra and they pound! They are the biggest under seat boxes I could find and quality is top notch. Not sure what odor the other reviewer was talking about. Mine had a very slight odor that was gone within a day of installing.
I installed with 2 12” SSA ICONs and a 2500 watt Sundown SIA amp. It’s a great combo and honestly too much if I crank it, but nice to have the power there if I want it.